251398352055 has 32 divisors (see below), whose sum is σ = 405042276096. Its totient is φ = 133146630144.

The previous prime is 251398352027. The next prime is 251398352071. The reversal of 251398352055 is 550253893152.

It is not a de Polignac number, because 251398352055 - 2⁷ = 251398351927 is a prime.

It is a super-2 number, since 2×251398352055² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 251398351995 and 251398352013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1552764 + ... + 1707006.

It is an arithmetic number, because the mean of its divisors is an integer number (12657571128).

Almost surely, 2^251398352055 is an apocalyptic number.

251398352055 is a deficient number, since it is larger than the sum of its proper divisors (153643924041).

251398352055 is a wasteful number, since it uses less digits than its factorization.

251398352055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155007.

The product of its (nonzero) digits is 1620000, while the sum is 48.

The spelling of 251398352055 in words is "two hundred fifty-one billion, three hundred ninety-eight million, three hundred fifty-two thousand, fifty-five".