251140531113 has 12 divisors (see below), whose sum is σ = 362763826308. Its totient is φ = 167424583200.

The previous prime is 251140531079. The next prime is 251140531139. The reversal of 251140531113 is 311135041152.

251140531113 is a `hidden beast` number, since 2 + 5 + 1 + 14 + 0 + 531 + 113 = 666.

251140531113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 57198940569 + 193941590544 = 239163^2 + 440388^2 .

It is not a de Polignac number, because 251140531113 - 2¹⁷ = 251140400041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (251140531153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 628663 + ... + 947363.

It is an arithmetic number, because the mean of its divisors is an integer number (30230318859).

Almost surely, 2^251140531113 is an apocalyptic number.

It is an amenable number.

251140531113 is a deficient number, since it is larger than the sum of its proper divisors (111623295195).

251140531113 is a wasteful number, since it uses less digits than its factorization.

251140531113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406264 (or 406261 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 251140531113 its reverse (311135041152), we get a palindrome (562275572265).

The spelling of 251140531113 in words is "two hundred fifty-one billion, one hundred forty million, five hundred thirty-one thousand, one hundred thirteen".