521230225 has 24 divisors (see below), whose sum is σ = 655735808. Its totient is φ = 410961600.

The previous prime is 521230223. The next prime is 521230291. The reversal of 521230225 is 522032125.

It is not a de Polignac number, because 521230225 - 2¹ = 521230223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521230196 and 521230205.

It is not an unprimeable number, because it can be changed into a prime (521230223) 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, 574222 + ... + 575128.

Almost surely, 2^521230225 is an apocalyptic number.

It is an amenable number.

521230225 is a deficient number, since it is larger than the sum of its proper divisors (134505583).

521230225 is a wasteful number, since it uses less digits than its factorization.

521230225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225 (or 1220 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 521230225 is about 22830.4670342067. The cubic root of 521230225 is about 804.7788057829.

The spelling of 521230225 in words is "five hundred twenty-one million, two hundred thirty thousand, two hundred twenty-five".