51231304 has 32 divisors (see below), whose sum is σ = 102695040. Its totient is φ = 23900800.

The previous prime is 51231289. The next prime is 51231329. The reversal of 51231304 is 40313215.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4149 + ... + 10939.

It is an arithmetic number, because the mean of its divisors is an integer number (3209220).

Almost surely, 2^51231304 is an apocalyptic number.

It is an amenable number.

51231304 is an abundant number, since it is smaller than the sum of its proper divisors (51463736).

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

51231304 is a wasteful number, since it uses less digits than its factorization.

51231304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6861 (or 6857 counting only the distinct ones).

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

The square root of 51231304 is about 7157.6046272479. The cubic root of 51231304 is about 371.4027685090.

Adding to 51231304 its reverse (40313215), we get a palindrome (91544519).

The spelling of 51231304 in words is "fifty-one million, two hundred thirty-one thousand, three hundred four".