51939132 has 24 divisors (see below), whose sum is σ = 138504576. Its totient is φ = 14839728.

The previous prime is 51939119. The next prime is 51939161. The reversal of 51939132 is 23193915.

It is a junction number, because it is equal to n+sod(n) for n = 51939093 and 51939102.

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, 309078 + ... + 309245.

It is an arithmetic number, because the mean of its divisors is an integer number (5771024).

Almost surely, 2^51939132 is an apocalyptic number.

It is an amenable number.

51939132 is an abundant number, since it is smaller than the sum of its proper divisors (86565444).

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

51939132 is a wasteful number, since it uses less digits than its factorization.

51939132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618337 (or 618335 counting only the distinct ones).

The product of its digits is 7290, while the sum is 33.

The square root of 51939132 is about 7206.8808787158. The cubic root of 51939132 is about 373.1054238921.

It can be divided in two parts, 5193913 and 2, that added together give a palindrome (5193915).

The spelling of 51939132 in words is "fifty-one million, nine hundred thirty-nine thousand, one hundred thirty-two".