521243342125 has 64 divisors (see below), whose sum is σ = 735571279872. Its totient is φ = 365479752000.

The previous prime is 521243342101. The next prime is 521243342141.

521243342125 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 521243342125 - 2¹⁵ = 521243309357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4269684 + ... + 4390066.

It is an arithmetic number, because the mean of its divisors is an integer number (11493301248).

Almost surely, 2^521243342125 is an apocalyptic number.

521243342125 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

521243342125 is a deficient number, since it is larger than the sum of its proper divisors (214327937747).

521243342125 is a wasteful number, since it uses less digits than its factorization.

521243342125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120523 (or 120513 counting only the distinct ones).

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

It can be divided in two parts, 521243 and 342125, that added together give a palindrome (863368).

The spelling of 521243342125 in words is "five hundred twenty-one billion, two hundred forty-three million, three hundred forty-two thousand, one hundred twenty-five".