164521357 has 16 divisors (see below), whose sum is σ = 220897152. Its totient is φ = 118336320.

The previous prime is 164521349. The next prime is 164521367. The reversal of 164521357 is 753125461.

It is a cyclic number.

It is not a de Polignac number, because 164521357 - 2³ = 164521349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164521337) 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, 81178 + ... + 83179.

It is an arithmetic number, because the mean of its divisors is an integer number (13806072).

Almost surely, 2^164521357 is an apocalyptic number.

It is an amenable number.

164521357 is a deficient number, since it is larger than the sum of its proper divisors (56375795).

164521357 is a wasteful number, since it uses less digits than its factorization.

164521357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164388.

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

The square root of 164521357 is about 12826.5878939023. The cubic root of 164521357 is about 547.9497851674.

The spelling of 164521357 in words is "one hundred sixty-four million, five hundred twenty-one thousand, three hundred fifty-seven".