257531326 has 12 divisors (see below), whose sum is σ = 418298472. Its totient is φ = 118860456.

The previous prime is 257531303. The next prime is 257531333. The reversal of 257531326 is 623135752.

It is a junction number, because it is equal to n+sod(n) for n = 257531291 and 257531300.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 380626 + ... + 381301.

It is an arithmetic number, because the mean of its divisors is an integer number (34858206).

Almost surely, 2^257531326 is an apocalyptic number.

257531326 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

257531326 is a deficient number, since it is larger than the sum of its proper divisors (160767146).

257531326 is a wasteful number, since it uses less digits than its factorization.

257531326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761955 (or 761942 counting only the distinct ones).

The product of its digits is 37800, while the sum is 34.

The square root of 257531326 is about 16047.7825882581. The cubic root of 257531326 is about 636.2239612473.

The spelling of 257531326 in words is "two hundred fifty-seven million, five hundred thirty-one thousand, three hundred twenty-six".