257013155 has 32 divisors (see below), whose sum is σ = 375681024. Its totient is φ = 164964096.

The previous prime is 257013151. The next prime is 257013161. The reversal of 257013155 is 551310752.

It is a happy number.

It is not a de Polignac number, because 257013155 - 2² = 257013151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257013151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34439 + ... + 41231.

It is an arithmetic number, because the mean of its divisors is an integer number (11740032).

Almost surely, 2^257013155 is an apocalyptic number.

257013155 is a deficient number, since it is larger than the sum of its proper divisors (118667869).

257013155 is a wasteful number, since it uses less digits than its factorization.

257013155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6875.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 257013155 is about 16031.6298298083. The cubic root of 257013155 is about 635.7969657344.

The spelling of 257013155 in words is "two hundred fifty-seven million, thirteen thousand, one hundred fifty-five".