521206228 has 12 divisors (see below), whose sum is σ = 912320640. Its totient is φ = 260543192.

The previous prime is 521206207. The next prime is 521206253. The reversal of 521206228 is 822602125.

It is a junction number, because it is equal to n+sod(n) for n = 521206196 and 521206205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8775 + ... + 33457.

It is an arithmetic number, because the mean of its divisors is an integer number (76026720).

Almost surely, 2^521206228 is an apocalyptic number.

It is an amenable number.

521206228 is a deficient number, since it is larger than the sum of its proper divisors (391114412).

521206228 is a wasteful number, since it uses less digits than its factorization.

521206228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29966 (or 29964 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 521206228 is about 22829.9414804331. The cubic root of 521206228 is about 804.7664551475.

The spelling of 521206228 in words is "five hundred twenty-one million, two hundred six thousand, two hundred twenty-eight".