51132992 has 56 divisors (see below), whose sum is σ = 105338880. Its totient is φ = 24611840.

The previous prime is 51132989. The next prime is 51132997. The reversal of 51132992 is 29923115.

It is a super-2 number, since 2×51132992² = 5229165741744128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (51132997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267617 + ... + 267807.

Almost surely, 2^51132992 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 51132992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52669440).

51132992 is an abundant number, since it is smaller than the sum of its proper divisors (54205888).

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

51132992 is a wasteful number, since it uses less digits than its factorization.

51132992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 329 counting only the distinct ones).

The product of its digits is 4860, while the sum is 32.

The square root of 51132992 is about 7150.7336686525. The cubic root of 51132992 is about 371.1650445185.

The spelling of 51132992 in words is "fifty-one million, one hundred thirty-two thousand, nine hundred ninety-two".