51255482531 has 4 divisors (see below), whose sum is σ = 55915071864. Its totient is φ = 46595893200.

The previous prime is 51255482527. The next prime is 51255482539. The reversal of 51255482531 is 13528455215.

51255482531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51255482531 - 2² = 51255482527 is a prime.

It is a super-2 number, since 2×51255482531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51255482539) 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, 2329794650 + ... + 2329794671.

It is an arithmetic number, because the mean of its divisors is an integer number (13978767966).

Almost surely, 2^51255482531 is an apocalyptic number.

51255482531 is a deficient number, since it is larger than the sum of its proper divisors (4659589333).

51255482531 is a wasteful number, since it uses less digits than its factorization.

51255482531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4659589332.

The product of its digits is 240000, while the sum is 41.

The spelling of 51255482531 in words is "fifty-one billion, two hundred fifty-five million, four hundred eighty-two thousand, five hundred thirty-one".