Properties of the Number 31149

Thirty-One Thousand One Hundred Forty-Nine

Basics

Value: 31148 → 31149 → 31150

Parity: odd

Prime: No

Previous Prime: 31147

Next Prime: 31151

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 3461

Divisors: 1, 3, 9, 3461, 10383, 31149

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100110101101

Octal: 74655

Duodecimal: 16039

Hexadecimal: 79ad

Square: 970260201

Square Root: 176.49079296099274

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

Partial sums of A299268. A299269

Iccanobirt numbers (15 of 15): a(n) = R(R(a(n-1)) + R(a(n-2)) + R(a(n-3))), where R is the digit reversal function A004086. A102125

Number of integer partitions of n whose parts are not in arithmetic progression. A389811

Starting numbers for which the RATS sequence has eventual period 3. A114613

Composite numbers for which A324644(n)/A324198(n) = 2 and σ(n) == 2 (mod 4). A371082

Self-reciprocating sequence: the integer part of powers of the reciprocal sum. A66173

Number of compositions of n where the smallest part is greater than or equal to the number of parts. A98131

G.f.: A(x) = 1 + ∑_n>=1 x^n² * ((1-x)ⁿ + 1/(1-x)ⁿ). A197707

Numbers whose square with its last digit deleted is also a square. A31149

Length of period of sequence starting with a(1)=prime(n), a(2)=prime(n+1) and a(n>2) = 2(gpf(a(n-1))+gpf(a(n-2)))+1, where gpf(m) is the greatest prime factor of m. A202397