15912131 has 2 divisors, whose sum is σ = 15912132. Its totient is φ = 15912130.

The previous prime is 15912079. The next prime is 15912151. The reversal of 15912131 is 13121951.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15912131 is a prime.

It is a super-2 number, since 2×15912131² = 506391825922322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 15912097 and 15912106.

It is not a weakly prime, because it can be changed into another prime (15912151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7956065 + 7956066.

It is an arithmetic number, because the mean of its divisors is an integer number (7956066).

Almost surely, 2^15912131 is an apocalyptic number.

15912131 is a deficient number, since it is larger than the sum of its proper divisors (1).

15912131 is an equidigital number, since it uses as much as digits as its factorization.

15912131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 23.

The square root of 15912131 is about 3989.0012534468. The cubic root of 15912131 is about 251.5220796212.

The spelling of 15912131 in words is "fifteen million, nine hundred twelve thousand, one hundred thirty-one".