51231100402 has 8 divisors (see below), whose sum is σ = 79325574912. Its totient is φ = 24789242100.

The previous prime is 51231100399. The next prime is 51231100441. The reversal of 51231100402 is 20400113215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51231100402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413153974 + ... + 413154097.

It is an arithmetic number, because the mean of its divisors is an integer number (9915696864).

Almost surely, 2^51231100402 is an apocalyptic number.

51231100402 is a deficient number, since it is larger than the sum of its proper divisors (28094474510).

51231100402 is a wasteful number, since it uses less digits than its factorization.

51231100402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826308104.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 51231100402 its reverse (20400113215), we get a palindrome (71631213617).

The spelling of 51231100402 in words is "fifty-one billion, two hundred thirty-one million, one hundred thousand, four hundred two".