51232032 has 36 divisors (see below), whose sum is σ = 145691910. Its totient is φ = 17077248.

The previous prime is 51232003. The next prime is 51232039. The reversal of 51232032 is 23023215.

It can be written as a sum of positive squares in only one way, i.e., 45643536 + 5588496 = 6756^2 + 2364^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×51232032² = 5249442205698048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 51231996 and 51232014.

It is not an unprimeable number, because it can be changed into a prime (51232039) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88657 + ... + 89232.

Almost surely, 2^51232032 is an apocalyptic number.

It is an amenable number.

51232032 is an abundant number, since it is smaller than the sum of its proper divisors (94459878).

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

51232032 is a wasteful number, since it uses less digits than its factorization.

51232032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177905 (or 177894 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 51232032 is about 7157.6554820695. The cubic root of 51232032 is about 371.4045277195.

Adding to 51232032 its reverse (23023215), we get a palindrome (74255247).

The spelling of 51232032 in words is "fifty-one million, two hundred thirty-two thousand, thirty-two".