521342243125 has 20 divisors (see below), whose sum is σ = 710693755200. Its totient is φ = 379157990000.

The previous prime is 521342243069. The next prime is 521342243153.

521342243125 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 521342243125 - 2²¹ = 521340145973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 37908925 + ... + 37922674.

It is an arithmetic number, because the mean of its divisors is an integer number (35534687760).

Almost surely, 2^521342243125 is an apocalyptic number.

521342243125 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

521342243125 is a deficient number, since it is larger than the sum of its proper divisors (189351512075).

521342243125 is an equidigital number, since it uses as much as digits as its factorization.

521342243125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75831630 (or 75831615 counting only the distinct ones).

The product of its digits is 57600, while the sum is 34.

It can be divided in two parts, 521342 and 243125, that added together give a palindrome (764467).

The spelling of 521342243125 in words is "five hundred twenty-one billion, three hundred forty-two million, two hundred forty-three thousand, one hundred twenty-five".