51534531 has 12 divisors (see below), whose sum is σ = 78817752. Its totient is φ = 32335296.

The previous prime is 51534523. The next prime is 51534541. The reversal of 51534531 is 13543515.

It is not a de Polignac number, because 51534531 - 2³ = 51534523 is a prime.

It is a super-2 number, since 2×51534531² = 5311615770779922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51534495 and 51534504.

It is not an unprimeable number, because it can be changed into a prime (51534541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168261 + ... + 168566.

It is an arithmetic number, because the mean of its divisors is an integer number (6568146).

Almost surely, 2^51534531 is an apocalyptic number.

51534531 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

51534531 is a deficient number, since it is larger than the sum of its proper divisors (27283221).

51534531 is a wasteful number, since it uses less digits than its factorization.

51534531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336850 (or 336847 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 51534531 is about 7178.7555328204. The cubic root of 51534531 is about 372.1340784465.

The spelling of 51534531 in words is "fifty-one million, five hundred thirty-four thousand, five hundred thirty-one".