51113325131 has 16 divisors (see below), whose sum is σ = 56067379200. Its totient is φ = 46211212320.

The previous prime is 51113325127. The next prime is 51113325139. The reversal of 51113325131 is 13152331115.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51113325131 - 2² = 51113325127 is a prime.

It is a super-2 number, since 2×51113325131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51113325131.

It is not an unprimeable number, because it can be changed into a prime (51113325139) 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, 1452956 + ... + 1487718.

It is an arithmetic number, because the mean of its divisors is an integer number (3504211200).

Almost surely, 2^51113325131 is an apocalyptic number.

51113325131 is a deficient number, since it is larger than the sum of its proper divisors (4954054069).

51113325131 is a wasteful number, since it uses less digits than its factorization.

51113325131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35506.

The product of its digits is 1350, while the sum is 26.

Adding to 51113325131 its reverse (13152331115), we get a palindrome (64265656246).

The spelling of 51113325131 in words is "fifty-one billion, one hundred thirteen million, three hundred twenty-five thousand, one hundred thirty-one".