251415255 has 32 divisors (see below), whose sum is σ = 495097344. Its totient is φ = 106091136.

The previous prime is 251415251. The next prime is 251415257. The reversal of 251415255 is 552514152.

It is not a de Polignac number, because 251415255 - 2² = 251415251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251415251) 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, 90729 + ... + 93458.

It is an arithmetic number, because the mean of its divisors is an integer number (15471792).

Almost surely, 2^251415255 is an apocalyptic number.

251415255 is a deficient number, since it is larger than the sum of its proper divisors (243682089).

251415255 is a wasteful number, since it uses less digits than its factorization.

251415255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184215.

The product of its digits is 10000, while the sum is 30.

The square root of 251415255 is about 15856.0794334539. The cubic root of 251415255 is about 631.1470285262.

The spelling of 251415255 in words is "two hundred fifty-one million, four hundred fifteen thousand, two hundred fifty-five".