Properties of the Number 2215

Two Thousand Two Hundred Fifteen

Basics

Value: 2214 → 2215 → 2216

Parity: odd

Prime: No

Previous Prime: 2213

Next Prime: 2221

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 5 × 443

Divisors: 1, 5, 443, 2215

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100010100111

Octal: 4247

Duodecimal: 1347

Hexadecimal: 8a7

Square: 4906225

Square Root: 47.06378650300037

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

Fourth spoke of a hexagonal spiral. A56108

Number of integer partitions of n whose multiplicities cover an initial interval of positive integers. A317081

Numbers n such that (n⁹⁷-1)/(n-1) is prime. A217089

Number of multisets summing to n that are the first sums of some nonempty multiset. A390446

a(n) = n² + 6. A114949

Numbers k such that 3^k - 20 is prime. A219041

Records for minima of the positive distance d between the seventh power of a positive integer·and the square of an integer y such that d = x⁷ - y² (x <> k² and y <> k⁷). A179784

Number T(n,k) of permutations of [n] with exactly k (possibly overlapping) occurrences of the consecutive pattern 1324; triangle T(n,k), n>=0, 0<=k<=max(0,floor(n/2-1)), read by rows. A264173

Numbers k such that lcm(1,2,3,...,k)/7 equals the denominator of the k-th harmonic number H(k). A112815

T(n,k)=Number of zero-sum -k..k arrays of n elements with first through third differences also in -k..k. A202511