164320251 has 16 divisors (see below), whose sum is σ = 228251520. Its totient is φ = 105058880.

The previous prime is 164320229. The next prime is 164320297. The reversal of 164320251 is 152023461.

It is a cyclic number.

It is not a de Polignac number, because 164320251 - 2⁶ = 164320187 is a prime.

It is a super-2 number, since 2×164320251² = 54002289777406002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164320451) 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, 4065 + ... + 18578.

It is an arithmetic number, because the mean of its divisors is an integer number (14265720).

Almost surely, 2^164320251 is an apocalyptic number.

164320251 is a deficient number, since it is larger than the sum of its proper divisors (63931269).

164320251 is a wasteful number, since it uses less digits than its factorization.

164320251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22746.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 164320251 is about 12818.7460775226. The cubic root of 164320251 is about 547.7264283094.

The spelling of 164320251 in words is "one hundred sixty-four million, three hundred twenty thousand, two hundred fifty-one".