51311460 has 24 divisors (see below), whose sum is σ = 143672256. Its totient is φ = 13683040.

The previous prime is 51311453. The next prime is 51311483. The reversal of 51311460 is 6411315.

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, 427536 + ... + 427655.

It is an arithmetic number, because the mean of its divisors is an integer number (5986344).

Almost surely, 2^51311460 is an apocalyptic number.

It is an amenable number.

51311460 is an abundant number, since it is smaller than the sum of its proper divisors (92360796).

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

51311460 is a wasteful number, since it uses less digits than its factorization.

51311460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855203 (or 855201 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 51311460 is about 7163.2017980788. The cubic root of 51311460 is about 371.5963652974.

Adding to 51311460 its reverse (6411315), we get a palindrome (57722775).

The spelling of 51311460 in words is "fifty-one million, three hundred eleven thousand, four hundred sixty".