15131996 has 24 divisors (see below), whose sum is σ = 29003520. Its totient is φ = 6850800.

The previous prime is 15131983. The next prime is 15132031. The reversal of 15131996 is 69913151.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14045 + ... + 15083.

It is an arithmetic number, because the mean of its divisors is an integer number (1208480).

Almost surely, 2^15131996 is an apocalyptic number.

It is an amenable number.

15131996 is a deficient number, since it is larger than the sum of its proper divisors (13871524).

15131996 is a wasteful number, since it uses less digits than its factorization.

15131996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385 (or 1383 counting only the distinct ones).

The product of its digits is 7290, while the sum is 35.

The square root of 15131996 is about 3889.9866323678. The cubic root of 15131996 is about 247.3424961228.

The spelling of 15131996 in words is "fifteen million, one hundred thirty-one thousand, nine hundred ninety-six".