251422513132 has 24 divisors (see below), whose sum is σ = 532424146464. Its totient is φ = 101414122752.

The previous prime is 251422513079. The next prime is 251422513151. The reversal of 251422513132 is 231315224152.

It is a happy number.

It is a super-2 number, since 2×251422513132² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 251422513094 and 251422513103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264098803 + ... + 264099754.

It is an arithmetic number, because the mean of its divisors is an integer number (22184339436).

Almost surely, 2^251422513132 is an apocalyptic number.

It is an amenable number.

251422513132 is an abundant number, since it is smaller than the sum of its proper divisors (281001633332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251422513132 is a wasteful number, since it uses less digits than its factorization.

251422513132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528198585 (or 528198583 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

Adding to 251422513132 its reverse (231315224152), we get a palindrome (482737737284).

The spelling of 251422513132 in words is "two hundred fifty-one billion, four hundred twenty-two million, five hundred thirteen thousand, one hundred thirty-two".