521303125 has 24 divisors (see below), whose sum is σ = 744702336. Its totient is φ = 357450000.

The previous prime is 521303093. The next prime is 521303129.

521303125 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 521303125 - 2⁵ = 521303093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521303096 and 521303105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521303129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9960 + ... + 33790.

It is an arithmetic number, because the mean of its divisors is an integer number (31029264).

Almost surely, 2^521303125 is an apocalyptic number.

It is an amenable number.

521303125 is a deficient number, since it is larger than the sum of its proper divisors (223399211).

521303125 is an frugal number, since it uses more digits than its factorization.

521303125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23863 (or 23843 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 521303125 is about 22832.0635291688. The cubic root of 521303125 is about 804.8163232030.

It can be divided in two parts, 52130 and 3125, that added together give a palindrome (55255).

The spelling of 521303125 in words is "five hundred twenty-one million, three hundred three thousand, one hundred twenty-five".