51431204 has 24 divisors (see below), whose sum is σ = 98849856. Its totient is φ = 23220000.

The previous prime is 51431189. The next prime is 51431213. The reversal of 51431204 is 40213415.

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, 2774 + ... + 10514.

It is an arithmetic number, because the mean of its divisors is an integer number (4118744).

Almost surely, 2^51431204 is an apocalyptic number.

It is an amenable number.

51431204 is a deficient number, since it is larger than the sum of its proper divisors (47418652).

51431204 is a wasteful number, since it uses less digits than its factorization.

51431204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7907 (or 7905 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 51431204 is about 7171.5552009310. Note that the first 3 decimals coincide. The cubic root of 51431204 is about 371.8852017915.

Adding to 51431204 its reverse (40213415), we get a palindrome (91644619).

The spelling of 51431204 in words is "fifty-one million, four hundred thirty-one thousand, two hundred four".