251264430131 has 16 divisors (see below), whose sum is σ = 297072007008. Its totient is φ = 209508249600.

The previous prime is 251264430103. The next prime is 251264430133. The reversal of 251264430131 is 131034462152.

It is not a de Polignac number, because 251264430131 - 2¹⁴ = 251264413747 is a prime.

It is a super-2 number, since 2×251264430131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251264430133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5573390 + ... + 5618291.

It is an arithmetic number, because the mean of its divisors is an integer number (18567000438).

Almost surely, 2^251264430131 is an apocalyptic number.

251264430131 is a deficient number, since it is larger than the sum of its proper divisors (45807576877).

251264430131 is a wasteful number, since it uses less digits than its factorization.

251264430131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11191862.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 251264430131 its reverse (131034462152), we get a palindrome (382298892283).

The spelling of 251264430131 in words is "two hundred fifty-one billion, two hundred sixty-four million, four hundred thirty thousand, one hundred thirty-one".