251426164 has 24 divisors (see below), whose sum is σ = 505260000. Its totient is φ = 108269280.

The previous prime is 251426113. The next prime is 251426167. The reversal of 251426164 is 461624152.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251426167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149539 + ... + 151210.

It is an arithmetic number, because the mean of its divisors is an integer number (21052500).

Almost surely, 2^251426164 is an apocalyptic number.

It is an amenable number.

251426164 is an abundant number, since it is smaller than the sum of its proper divisors (253833836).

251426164 is a wasteful number, since it uses less digits than its factorization.

251426164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300783 (or 300781 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 251426164 is about 15856.4234302695. The cubic root of 251426164 is about 631.1561569611.

The spelling of 251426164 in words is "two hundred fifty-one million, four hundred twenty-six thousand, one hundred sixty-four".