15996081 has 16 divisors (see below), whose sum is σ = 23227200. Its totient is φ = 9753408.

The previous prime is 15996073. The next prime is 15996083. The reversal of 15996081 is 18069951.

It is not a de Polignac number, because 15996081 - 2³ = 15996073 is a prime.

It is a super-2 number, since 2×15996081² = 511749214717122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15996083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3186 + ... + 6491.

It is an arithmetic number, because the mean of its divisors is an integer number (1451700).

Almost surely, 2^15996081 is an apocalyptic number.

It is an amenable number.

15996081 is a deficient number, since it is larger than the sum of its proper divisors (7231119).

15996081 is a wasteful number, since it uses less digits than its factorization.

15996081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9728.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 15996081 is about 3999.5100949991. The cubic root of 15996081 is about 251.9636348382.

The spelling of 15996081 in words is "fifteen million, nine hundred ninety-six thousand, eighty-one".