521383125 has 20 divisors (see below), whose sum is σ = 868696928. Its totient is φ = 278070000.

The previous prime is 521383117. The next prime is 521383139.

521383125 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 521383125 - 2³ = 521383117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521383092 and 521383101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 137161 + ... + 140910.

Almost surely, 2^521383125 is an apocalyptic number.

It is an amenable number.

521383125 is a deficient number, since it is larger than the sum of its proper divisors (347313803).

521383125 is an equidigital number, since it uses as much as digits as its factorization.

521383125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278094 (or 278079 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 521383125 is about 22833.8153842059. The cubic root of 521383125 is about 804.8574905581.

The spelling of 521383125 in words is "five hundred twenty-one million, three hundred eighty-three thousand, one hundred twenty-five".