53121323055500 has 96 divisors (see below), whose sum is σ = 132601086578688. Its totient is φ = 18211615128000.

The previous prime is 53121323055481. The next prime is 53121323055509. The reversal of 53121323055500 is 555032312135.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (53121323055509) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 45139565 + ... + 46301435.

It is an arithmetic number, because the mean of its divisors is an integer number (1381261318528).

Almost surely, 2^{53121323055500} is an apocalyptic number.

53121323055500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

53121323055500 is an abundant number, since it is smaller than the sum of its proper divisors (79479763523188).

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

53121323055500 is a wasteful number, since it uses less digits than its factorization.

53121323055500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174960 (or 1174948 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 35.

Adding to 53121323055500 its reverse (555032312135), we get a palindrome (53676355367635).

The spelling of 53121323055500 in words is "fifty-three trillion, one hundred twenty-one billion, three hundred twenty-three million, fifty-five thousand, five hundred".