521272364 has 12 divisors (see below), whose sum is σ = 912524424. Its totient is φ = 260551104.

The previous prime is 521272321. The next prime is 521272369. The reversal of 521272364 is 463272125.

It is a self number, because there is not a number n which added to its sum of digits gives 521272364.

It is not an unprimeable number, because it can be changed into a prime (521272369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6317 + ... + 32900.

It is an arithmetic number, because the mean of its divisors is an integer number (76043702).

Almost surely, 2^521272364 is an apocalyptic number.

It is an amenable number.

521272364 is a deficient number, since it is larger than the sum of its proper divisors (391252060).

521272364 is a wasteful number, since it uses less digits than its factorization.

521272364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42544 (or 42542 counting only the distinct ones).

The product of its digits is 20160, while the sum is 32.

The square root of 521272364 is about 22831.3898832287. The cubic root of 521272364 is about 804.8004927193.

The spelling of 521272364 in words is "five hundred twenty-one million, two hundred seventy-two thousand, three hundred sixty-four".