257604531 has 8 divisors (see below), whose sum is σ = 358406400. Its totient is φ = 164269512.

The previous prime is 257604511. The next prime is 257604541. The reversal of 257604531 is 135406752.

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

It is not a de Polignac number, because 257604531 - 2⁵ = 257604499 is a prime.

It is a super-2 number, since 2×257604531² = 132720188783459922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257604492 and 257604501.

It is not an unprimeable number, because it can be changed into a prime (257604511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1866631 + ... + 1866768.

It is an arithmetic number, because the mean of its divisors is an integer number (44800800).

Almost surely, 2^257604531 is an apocalyptic number.

257604531 is a deficient number, since it is larger than the sum of its proper divisors (100801869).

257604531 is a wasteful number, since it uses less digits than its factorization.

257604531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733425.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 257604531 is about 16050.0632709033. The cubic root of 257604531 is about 636.2842391734.

The spelling of 257604531 in words is "two hundred fifty-seven million, six hundred four thousand, five hundred thirty-one".