521252252125 has 64 divisors (see below), whose sum is σ = 717187820544. Its totient is φ = 375081000000.

The previous prime is 521252252117. The next prime is 521252252137.

521252252125 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 521252252125 - 2³ = 521252252117 is a prime.

It is a Duffinian number.

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, 154626690 + ... + 154630060.

It is an arithmetic number, because the mean of its divisors is an integer number (11206059696).

Almost surely, 2^521252252125 is an apocalyptic number.

521252252125 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

521252252125 is a deficient number, since it is larger than the sum of its proper divisors (195935568419).

521252252125 is a wasteful number, since it uses less digits than its factorization.

521252252125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4555 (or 4545 counting only the distinct ones).

The product of its digits is 40000, while the sum is 34.

It can be divided in two parts, 521252 and 252125, that added together give a palindrome (773377).

The spelling of 521252252125 in words is "five hundred twenty-one billion, two hundred fifty-two million, two hundred fifty-two thousand, one hundred twenty-five".