51021232402 has 16 divisors (see below), whose sum is σ = 87482238912. Its totient is φ = 21861925200.

The previous prime is 51021232387. The next prime is 51021232433. The reversal of 51021232402 is 20423212015.

It is a happy number.

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, 285808 + ... + 428635.

It is an arithmetic number, because the mean of its divisors is an integer number (5467639932).

Almost surely, 2^51021232402 is an apocalyptic number.

51021232402 is a deficient number, since it is larger than the sum of its proper divisors (36461006510).

51021232402 is a wasteful number, since it uses less digits than its factorization.

51021232402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719553.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 51021232402 its reverse (20423212015), we get a palindrome (71444444417).

The spelling of 51021232402 in words is "fifty-one billion, twenty-one million, two hundred thirty-two thousand, four hundred two".