51602310021 has 8 divisors (see below), whose sum is σ = 69129161824. Its totient is φ = 34238499120.

The previous prime is 51602309987. The next prime is 51602310047. The reversal of 51602310021 is 12001320615.

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

It is not a de Polignac number, because 51602310021 - 2²² = 51598115717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51602310021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51602310091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40759486 + ... + 40760751.

It is an arithmetic number, because the mean of its divisors is an integer number (8641145228).

Almost surely, 2^51602310021 is an apocalyptic number.

It is an amenable number.

51602310021 is a deficient number, since it is larger than the sum of its proper divisors (17526851803).

51602310021 is a wasteful number, since it uses less digits than its factorization.

51602310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81520451.

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

Adding to 51602310021 its reverse (12001320615), we get a palindrome (63603630636).

The spelling of 51602310021 in words is "fifty-one billion, six hundred two million, three hundred ten thousand, twenty-one".