257148156 has 24 divisors (see below), whose sum is σ = 611334864. Its totient is φ = 84098560.

The previous prime is 257148091. The next prime is 257148161. The reversal of 257148156 is 651841752.

It is a super-2 number, since 2×257148156² = 132250348268400672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201525 + ... + 202796.

It is an arithmetic number, because the mean of its divisors is an integer number (25472286).

Almost surely, 2^257148156 is an apocalyptic number.

It is an amenable number.

257148156 is an abundant number, since it is smaller than the sum of its proper divisors (354186708).

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

257148156 is a wasteful number, since it uses less digits than its factorization.

257148156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404381 (or 404379 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The square root of 257148156 is about 16035.8397347941. The cubic root of 257148156 is about 635.9082676922.

The spelling of 257148156 in words is "two hundred fifty-seven million, one hundred forty-eight thousand, one hundred fifty-six".