51311484531 has 32 divisors (see below), whose sum is σ = 80982048000. Its totient is φ = 32016777984.

The previous prime is 51311484529. The next prime is 51311484547. The reversal of 51311484531 is 13548411315.

51311484531 is a `hidden beast` number, since 5 + 1 + 3 + 114 + 8 + 4 + 531 = 666.

It is not a de Polignac number, because 51311484531 - 2¹ = 51311484529 is a prime.

It is a super-2 number, since 2×51311484531² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51311484571) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 559966 + ... + 645123.

It is an arithmetic number, because the mean of its divisors is an integer number (2530689000).

Almost surely, 2^51311484531 is an apocalyptic number.

51311484531 is a deficient number, since it is larger than the sum of its proper divisors (29670563469).

51311484531 is a wasteful number, since it uses less digits than its factorization.

51311484531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205200 (or 1205194 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

Adding to 51311484531 its reverse (13548411315), we get a palindrome (64859895846).

The spelling of 51311484531 in words is "fifty-one billion, three hundred eleven million, four hundred eighty-four thousand, five hundred thirty-one".