521323125 has 40 divisors (see below), whose sum is σ = 896712960. Its totient is φ = 269040000.

The previous prime is 521323093. The next prime is 521323151.

It is a happy number.

521323125 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 521323125 - 2⁵ = 521323093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521323095 and 521323104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 53641 + ... + 62609.

It is an arithmetic number, because the mean of its divisors is an integer number (22417824).

Almost surely, 2^521323125 is an apocalyptic number.

It is an amenable number.

521323125 is a deficient number, since it is larger than the sum of its proper divisors (375389835).

521323125 is an equidigital number, since it uses as much as digits as its factorization.

521323125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9023 (or 9008 counting only the distinct ones).

The product of its digits is 1800, while the sum is 24.

The square root of 521323125 is about 22832.5015055293. The cubic root of 521323125 is about 804.8266154366.

The spelling of 521323125 in words is "five hundred twenty-one million, three hundred twenty-three thousand, one hundred twenty-five".