53121357402 has 16 divisors (see below), whose sum is σ = 107274198720. Its totient is φ = 17535205152.

The previous prime is 53121357391. The next prime is 53121357433. The reversal of 53121357402 is 20475312135.

It is a super-2 number, since 2×53121357402² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42977827 + ... + 42979062.

It is an arithmetic number, because the mean of its divisors is an integer number (6704637420).

Almost surely, 2^53121357402 is an apocalyptic number.

53121357402 is an abundant number, since it is smaller than the sum of its proper divisors (54152841318).

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

53121357402 is a wasteful number, since it uses less digits than its factorization.

53121357402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85956997.

The product of its (nonzero) digits is 25200, while the sum is 33.

Adding to 53121357402 its reverse (20475312135), we get a palindrome (73596669537).

The spelling of 53121357402 in words is "fifty-three billion, one hundred twenty-one million, three hundred fifty-seven thousand, four hundred two".