251403055255 has 16 divisors (see below), whose sum is σ = 348468835104. Its totient is φ = 172083374080.

The previous prime is 251403055229. The next prime is 251403055363. The reversal of 251403055255 is 552550304152.

It is not a de Polignac number, because 251403055255 - 2¹¹ = 251403053207 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 134439202 + ... + 134441071.

It is an arithmetic number, because the mean of its divisors is an integer number (21779302194).

Almost surely, 2^251403055255 is an apocalyptic number.

251403055255 is a deficient number, since it is larger than the sum of its proper divisors (97065779849).

251403055255 is a wasteful number, since it uses less digits than its factorization.

251403055255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268880306.

The product of its (nonzero) digits is 150000, while the sum is 37.

The spelling of 251403055255 in words is "two hundred fifty-one billion, four hundred three million, fifty-five thousand, two hundred fifty-five".