164531257 has 8 divisors (see below), whose sum is σ = 179654112. Its totient is φ = 149436000.

The previous prime is 164531243. The next prime is 164531309. The reversal of 164531257 is 752135461.

164531257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164531257 - 2²⁷ = 30313529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164531057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6757 + ... + 19357.

It is an arithmetic number, because the mean of its divisors is an integer number (22456764).

Almost surely, 2^164531257 is an apocalyptic number.

It is an amenable number.

164531257 is a deficient number, since it is larger than the sum of its proper divisors (15122855).

164531257 is a wasteful number, since it uses less digits than its factorization.

164531257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13799.

The product of its digits is 25200, while the sum is 34.

The square root of 164531257 is about 12826.9738052278. The cubic root of 164531257 is about 547.9607758257.

The spelling of 164531257 in words is "one hundred sixty-four million, five hundred thirty-one thousand, two hundred fifty-seven".