51310402 has 16 divisors (see below), whose sum is σ = 90421632. Its totient is φ = 21528720.

The previous prime is 51310387. The next prime is 51310411. The reversal of 51310402 is 20401315.

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, 89418 + ... + 89989.

It is an arithmetic number, because the mean of its divisors is an integer number (5651352).

Almost surely, 2^51310402 is an apocalyptic number.

51310402 is a deficient number, since it is larger than the sum of its proper divisors (39111230).

51310402 is a wasteful number, since it uses less digits than its factorization.

51310402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179433.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 51310402 is about 7163.1279480406. The cubic root of 51310402 is about 371.5938112763.

Adding to 51310402 its reverse (20401315), we get a palindrome (71711717).

The spelling of 51310402 in words is "fifty-one million, three hundred ten thousand, four hundred two".