521005500125 has 16 divisors (see below), whose sum is σ = 709325308224. Its totient is φ = 378913090000.

The previous prime is 521005500107. The next prime is 521005500179.

521005500125 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 521005500125 - 2⁸ = 521005499869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521005500094 and 521005500103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189455171 + ... + 189457920.

It is an arithmetic number, because the mean of its divisors is an integer number (44332831764).

Almost surely, 2^521005500125 is an apocalyptic number.

521005500125 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

521005500125 is a deficient number, since it is larger than the sum of its proper divisors (188319808099).

521005500125 is a wasteful number, since it uses less digits than its factorization.

521005500125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378913117 (or 378913107 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 26.

The spelling of 521005500125 in words is "five hundred twenty-one billion, five million, five hundred thousand, one hundred twenty-five".