164315257 has 4 divisors (see below), whose sum is σ = 164789136. Its totient is φ = 163841380.

The previous prime is 164315237. The next prime is 164315269. The reversal of 164315257 is 752513461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 164315257 - 2¹¹ = 164313209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164315237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236419 + ... + 237112.

It is an arithmetic number, because the mean of its divisors is an integer number (41197284).

Almost surely, 2^164315257 is an apocalyptic number.

It is an amenable number.

164315257 is a deficient number, since it is larger than the sum of its proper divisors (473879).

164315257 is an equidigital number, since it uses as much as digits as its factorization.

164315257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473878.

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

The square root of 164315257 is about 12818.5512831989. The cubic root of 164315257 is about 547.7208794427.

It can be divided in two parts, 1643 and 15257, that added together give a square (16900 = 130²).

The spelling of 164315257 in words is "one hundred sixty-four million, three hundred fifteen thousand, two hundred fifty-seven".