53502431123 has 4 divisors (see below), whose sum is σ = 53503594848. Its totient is φ = 53501267400.

The previous prime is 53502431071. The next prime is 53502431159. The reversal of 53502431123 is 32113420535.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53502431123 is a prime.

It is a super-2 number, since 2×53502431123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53502431023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509936 + ... + 605837.

It is an arithmetic number, because the mean of its divisors is an integer number (13375898712).

Almost surely, 2^53502431123 is an apocalyptic number.

53502431123 is a deficient number, since it is larger than the sum of its proper divisors (1163725).

53502431123 is a wasteful number, since it uses less digits than its factorization.

53502431123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163724.

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 53502431123 its reverse (32113420535), we get a palindrome (85615851658).

The spelling of 53502431123 in words is "fifty-three billion, five hundred two million, four hundred thirty-one thousand, one hundred twenty-three".