16131657 has 16 divisors (see below), whose sum is σ = 23118912. Its totient is φ = 9968640.

The previous prime is 16131653. The next prime is 16131677. The reversal of 16131657 is 75613161.

16131657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16131657 - 2² = 16131653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16131653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1057 + ... + 5777.

It is an arithmetic number, because the mean of its divisors is an integer number (1444932).

Almost surely, 2^16131657 is an apocalyptic number.

16131657 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16131657 is a deficient number, since it is larger than the sum of its proper divisors (6987255).

16131657 is a wasteful number, since it uses less digits than its factorization.

16131657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4808.

The product of its digits is 3780, while the sum is 30.

The square root of 16131657 is about 4016.4234089548. The cubic root of 16131657 is about 252.6734787983.

The spelling of 16131657 in words is "sixteen million, one hundred thirty-one thousand, six hundred fifty-seven".