251320430151 has 12 divisors (see below), whose sum is σ = 414878170512. Its totient is φ = 143611674336.

The previous prime is 251320430089. The next prime is 251320430173. The reversal of 251320430151 is 151034023152.

251320430151 is a `hidden beast` number, since 2 + 51 + 32 + 0 + 430 + 151 = 666.

It is not a de Polignac number, because 251320430151 - 2⁹ = 251320429639 is a prime.

It is a super-2 number, since 2×251320430151² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251320430051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1994606526 + ... + 1994606651.

It is an arithmetic number, because the mean of its divisors is an integer number (34573180876).

Almost surely, 2^251320430151 is an apocalyptic number.

251320430151 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

251320430151 is a deficient number, since it is larger than the sum of its proper divisors (163557740361).

251320430151 is a wasteful number, since it uses less digits than its factorization.

251320430151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3989213190 (or 3989213187 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 251320430151 in words is "two hundred fifty-one billion, three hundred twenty million, four hundred thirty thousand, one hundred fifty-one".