251010255 has 32 divisors (see below), whose sum is σ = 419880960. Its totient is φ = 127895040.

The previous prime is 251010251. The next prime is 251010259. The reversal of 251010255 is 552010152.

It is an interprime number because it is at equal distance from previous prime (251010251) and next prime (251010259).

It is not a de Polignac number, because 251010255 - 2² = 251010251 is a prime.

It is a super-2 number, since 2×251010255² = 126012296230330050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251010251) 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, 33319 + ... + 40151.

It is an arithmetic number, because the mean of its divisors is an integer number (13121280).

Almost surely, 2^251010255 is an apocalyptic number.

251010255 is a deficient number, since it is larger than the sum of its proper divisors (168870705).

251010255 is a wasteful number, since it uses less digits than its factorization.

251010255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6951.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 251010255 is about 15843.3031593794. The cubic root of 251010255 is about 630.8079455161.

The spelling of 251010255 in words is "two hundred fifty-one million, ten thousand, two hundred fifty-five".