51132432 has 40 divisors (see below), whose sum is σ = 142254784. Its totient is φ = 15732864.

The previous prime is 51132397. The next prime is 51132449. The reversal of 51132432 is 23423115.

It is a super-2 number, since 2×51132432² = 5229051204469248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51132399 and 51132408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40348 + ... + 41595.

Almost surely, 2^51132432 is an apocalyptic number.

51132432 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51132432 is an abundant number, since it is smaller than the sum of its proper divisors (91122352).

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

51132432 is a wasteful number, since it uses less digits than its factorization.

51132432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81967 (or 81961 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 51132432 is about 7150.6945117240. The cubic root of 51132432 is about 371.1636895344.

Adding to 51132432 its reverse (23423115), we get a palindrome (74555547).

The spelling of 51132432 in words is "fifty-one million, one hundred thirty-two thousand, four hundred thirty-two".