53121357393 has 32 divisors (see below), whose sum is σ = 80782523136. Its totient is φ = 30759948288.

The previous prime is 53121357391. The next prime is 53121357433. The reversal of 53121357393 is 39375312135.

53121357393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53121357393 - 2¹ = 53121357391 is a prime.

It is a super-2 number, since 2×53121357393² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53121357391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4418196 + ... + 4430202.

It is an arithmetic number, because the mean of its divisors is an integer number (2524453848).

Almost surely, 2^53121357393 is an apocalyptic number.

It is an amenable number.

53121357393 is a deficient number, since it is larger than the sum of its proper divisors (27661165743).

53121357393 is a wasteful number, since it uses less digits than its factorization.

53121357393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18713.

The product of its digits is 255150, while the sum is 42.

The spelling of 53121357393 in words is "fifty-three billion, one hundred twenty-one million, three hundred fifty-seven thousand, three hundred ninety-three".