51231232 has 80 divisors (see below), whose sum is σ = 113430240. Its totient is φ = 22966272.

The previous prime is 51231227. The next prime is 51231233. The reversal of 51231232 is 23213215.

It is not an unprimeable number, because it can be changed into a prime (51231233) 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, 286119 + ... + 286297.

It is an arithmetic number, because the mean of its divisors is an integer number (1417878).

Almost surely, 2^51231232 is an apocalyptic number.

51231232 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 51231232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56715120).

51231232 is an abundant number, since it is smaller than the sum of its proper divisors (62199008).

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

51231232 is a wasteful number, since it uses less digits than its factorization.

51231232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 237 counting only the distinct ones).

The product of its digits is 360, while the sum is 19.

The square root of 51231232 is about 7157.5995976305. The cubic root of 51231232 is about 371.4025945203.

Adding to 51231232 its reverse (23213215), we get a palindrome (74444447).

The spelling of 51231232 in words is "fifty-one million, two hundred thirty-one thousand, two hundred thirty-two".