51238332 has 30 divisors (see below), whose sum is σ = 133947968. Its totient is φ = 17079336.

The previous prime is 51238309. The next prime is 51238339. The reversal of 51238332 is 23383215.

It is a super-2 number, since 2×51238332² = 5250733332284448, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 51238296 and 51238305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51238339) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 78748 + ... + 79395.

Almost surely, 2^51238332 is an apocalyptic number.

It is an amenable number.

51238332 is an abundant number, since it is smaller than the sum of its proper divisors (82709636).

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

51238332 is a wasteful number, since it uses less digits than its factorization.

51238332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158159 (or 158148 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 51238332 is about 7158.0955567804. The cubic root of 51238332 is about 371.4197509599.

The spelling of 51238332 in words is "fifty-one million, two hundred thirty-eight thousand, three hundred thirty-two".