Properties of the Number 25222

Twenty-Five Thousand Two Hundred Twenty-Two

Basics

Value: 25221 → 25222 → 25223

Parity: even

Prime: No

Previous Prime: 25219

Next Prime: 25229

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 × 12611

Divisors: 1, 2, 12611, 25222

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110001010000110

Octal: 61206

Duodecimal: 1271A

Hexadecimal: 6286

Square: 636149284

Square Root: 158.8143570336133

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Numbers using only the digits 2 and 5, that are both curved and straight. A72961

Lexicographically earliest sequence of increasing numbers whose digits satisfy the "Fractal Jump" rule using only the digits 2 and 5: keep the first digit "d" of the sequence, then jump over the next "d" digits and keep the digit "e" on which you have landed. Jump now over the next "e" digits and keep the digit "f" on which you have landed, etc. The succession "def..." of kept digits is the sequence itself. A105647

Number of Dyck paths of semilength n such that all positive levels up to the highest level have a positive number of peaks and the number of peaks of adjacent levels is different. A287989

Near-repdigit semiprimes with 2 as repeated digit. A105983

Equal count of primes congruent to 1 mod 4 and 3 mod 4 associated with primes in A007351 (the zero beginning the sequence indicates the prime 2). A92198

T(1, c) = prime(c). T(r + 1, c) = (T(r, c') + T(r, c'+1)) / 2 where c' is the c-th number such that T(r, c') + T(r, c'+1) is even. Table for T read downwards by antidiagonals. A287943

a(n) = [ Sum{(sqrt(j+1)-sqrt(i+1))²} ], 1 <= i < j <= n. A25222