Properties of the Number 21229

Twenty-One Thousand Two Hundred Twenty-Nine

Basics

Value: 21228 → 21229 → 21230

Parity: odd

Prime: No

Previous Prime: 21227

Next Prime: 21247

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 13 × 23 × 71

Divisors: 1, 13, 23, 71, 299, 923, 1633, 21229

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101001011101101

Octal: 51355

Duodecimal: 10351

Hexadecimal: 52ed

Square: 450670441

Square Root: 145.7017501610739

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

Number of symmetrical planar partitions of n (planar partitions (A000219) that when regarded as 3-D objects have just one symmetry plane). A784

Expansion of 1/(1+x²-2·x³). A77912

Expansion of 1/(1+x²+2·x³). A77963

Non-semiprime composite numbers e such that there is no 0<a<b<c<d<e for which a! * b! * c! * d! * e! is a perfect square. A392333

Zeroless analog of tribonacci numbers. A371911

Number of n-node forests not determined by their spectra. A6611

Nonsquare factors k > 0 such that k·x² - 1 produces a new minimum of its Hardy-Littlewood constant. A331948

Expansion of 1/((1-x)(1-2x)(1-7x)(1-9x)). A21229

Number of length 7+6 0..n arrays with no seven consecutive terms having the maximum of any three terms equal to the minimum of the remaining four terms. A249890