251432252164 has 12 divisors (see below), whose sum is σ = 447464178000. Its totient is φ = 123585344168.

The previous prime is 251432252161. The next prime is 251432252167. The reversal of 251432252164 is 461252234152.

It is an interprime number because it is at equal distance from previous prime (251432252161) and next prime (251432252167).

It is a super-2 number, since 2×251432252164² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (251432252161) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 532695214 + ... + 532695685.

It is an arithmetic number, because the mean of its divisors is an integer number (37288681500).

Almost surely, 2^251432252164 is an apocalyptic number.

It is an amenable number.

251432252164 is a deficient number, since it is larger than the sum of its proper divisors (196031925836).

251432252164 is a wasteful number, since it uses less digits than its factorization.

251432252164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065390962 (or 1065390960 counting only the distinct ones).

The product of its digits is 115200, while the sum is 37.

The spelling of 251432252164 in words is "two hundred fifty-one billion, four hundred thirty-two million, two hundred fifty-two thousand, one hundred sixty-four".