51131313452 has 12 divisors (see below), whose sum is σ = 89484256680. Its totient is φ = 25564382976.

The previous prime is 51131313451. The next prime is 51131313503. The reversal of 51131313452 is 25431313115.

It is a super-2 number, since 2×51131313452² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51131313451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225077 + ... + 391052.

It is an arithmetic number, because the mean of its divisors is an integer number (7457021390).

Almost surely, 2^51131313452 is an apocalyptic number.

It is an amenable number.

51131313452 is a deficient number, since it is larger than the sum of its proper divisors (38352943228).

51131313452 is a wasteful number, since it uses less digits than its factorization.

51131313452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636880 (or 636878 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

Adding to 51131313452 its reverse (25431313115), we get a palindrome (76562626567).

The spelling of 51131313452 in words is "fifty-one billion, one hundred thirty-one million, three hundred thirteen thousand, four hundred fifty-two".