51556232 has 96 divisors (see below), whose sum is σ = 123721920. Its totient is φ = 19958400.

The previous prime is 51556231. The next prime is 51556243. The reversal of 51556232 is 23265515.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51556195 and 51556204.

It is not an unprimeable number, because it can be changed into a prime (51556231) 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, 341357 + ... + 341507.

It is an arithmetic number, because the mean of its divisors is an integer number (1288770).

Almost surely, 2^51556232 is an apocalyptic number.

51556232 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51556232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61860960).

51556232 is an abundant number, since it is smaller than the sum of its proper divisors (72165688).

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

51556232 is a wasteful number, since it uses less digits than its factorization.

51556232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 240 counting only the distinct ones).

The product of its digits is 9000, while the sum is 29.

The square root of 51556232 is about 7180.2668474089. The cubic root of 51556232 is about 372.1863058767.

The spelling of 51556232 in words is "fifty-one million, five hundred fifty-six thousand, two hundred thirty-two".