51513532 has 12 divisors (see below), whose sum is σ = 103027120. Its totient is φ = 22077216.

The previous prime is 51513433. The next prime is 51513533. The reversal of 51513532 is 23531515.

51513532 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 51513497 and 51513506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51513533) 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, 919857 + ... + 919912.

Almost surely, 2^51513532 is an apocalyptic number.

It is an amenable number.

51513532 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51513532 is a wasteful number, since it uses less digits than its factorization.

51513532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839780 (or 1839778 counting only the distinct ones).

The product of its digits is 2250, while the sum is 25.

The square root of 51513532 is about 7177.2928043936. The cubic root of 51513532 is about 372.0835265480.

The spelling of 51513532 in words is "fifty-one million, five hundred thirteen thousand, five hundred thirty-two".