15631996 has 12 divisors (see below), whose sum is σ = 28545552. Its totient is φ = 7476128.

The previous prime is 15631981. The next prime is 15631997. The reversal of 15631996 is 69913651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15631997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84865 + ... + 85048.

It is an arithmetic number, because the mean of its divisors is an integer number (2378796).

Almost surely, 2^15631996 is an apocalyptic number.

It is an amenable number.

15631996 is a deficient number, since it is larger than the sum of its proper divisors (12913556).

15631996 is a wasteful number, since it uses less digits than its factorization.

15631996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169940 (or 169938 counting only the distinct ones).

The product of its digits is 43740, while the sum is 40.

The square root of 15631996 is about 3953.7319079573. The cubic root of 15631996 is about 250.0373064326.

The spelling of 15631996 in words is "fifteen million, six hundred thirty-one thousand, nine hundred ninety-six".