51979932 has 72 divisors (see below), whose sum is σ = 138657792. Its totient is φ = 16394400.

The previous prime is 51979903. The next prime is 51979933. The reversal of 51979932 is 23997915.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51979933) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51957 + ... + 52947.

Almost surely, 2^51979932 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51979932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69328896).

51979932 is an abundant number, since it is smaller than the sum of its proper divisors (86677860).

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

51979932 is a wasteful number, since it uses less digits than its factorization.

51979932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079 (or 1074 counting only the distinct ones).

The product of its digits is 153090, while the sum is 45.

The square root of 51979932 is about 7209.7109512102. The cubic root of 51979932 is about 373.2030940973.

It can be divided in two parts, 5197 and 9932, that added together give a square (15129 = 123²).

The spelling of 51979932 in words is "fifty-one million, nine hundred seventy-nine thousand, nine hundred thirty-two".