251765055 has 12 divisors (see below), whose sum is σ = 436392840. Its totient is φ = 134274672.

The previous prime is 251764987. The next prime is 251765071. The reversal of 251765055 is 550567152.

It is a happy number.

251765055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 251765055 - 2¹⁵ = 251732287 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2797345 + ... + 2797434.

It is an arithmetic number, because the mean of its divisors is an integer number (36366070).

Almost surely, 2^251765055 is an apocalyptic number.

251765055 is a deficient number, since it is larger than the sum of its proper divisors (184627785).

251765055 is a wasteful number, since it uses less digits than its factorization.

251765055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5594790 (or 5594787 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 36.

The square root of 251765055 is about 15867.1060688457. The cubic root of 251765055 is about 631.4396028169.

The spelling of 251765055 in words is "two hundred fifty-one million, seven hundred sixty-five thousand, fifty-five".