257155332 has 48 divisors (see below), whose sum is σ = 699753600. Its totient is φ = 73471776.

The previous prime is 257155309. The next prime is 257155357. The reversal of 257155332 is 233551752.

It is a super-2 number, since 2×257155332² = 132257729552060448, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257155293 and 257155302.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 27123 + ... + 35354.

It is an arithmetic number, because the mean of its divisors is an integer number (14578200).

Almost surely, 2^257155332 is an apocalyptic number.

It is an amenable number.

257155332 is an abundant number, since it is smaller than the sum of its proper divisors (442598268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257155332 is a wasteful number, since it uses less digits than its factorization.

257155332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62505 (or 62489 counting only the distinct ones).

The product of its digits is 31500, while the sum is 33.

The square root of 257155332 is about 16036.0634820395. The cubic root of 257155332 is about 635.9141828753.

The spelling of 257155332 in words is "two hundred fifty-seven million, one hundred fifty-five thousand, three hundred thirty-two".