521427164 has 6 divisors (see below), whose sum is σ = 912497544. Its totient is φ = 260713580.

The previous prime is 521427131. The next prime is 521427169. The reversal of 521427164 is 461724125.

It is a self number, because there is not a number n which added to its sum of digits gives 521427164.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521427169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65178392 + ... + 65178399.

It is an arithmetic number, because the mean of its divisors is an integer number (152082924).

Almost surely, 2^521427164 is an apocalyptic number.

It is an amenable number.

521427164 is a deficient number, since it is larger than the sum of its proper divisors (391070380).

521427164 is a wasteful number, since it uses less digits than its factorization.

521427164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130356795 (or 130356793 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 521427164 is about 22834.7797011489. The cubic root of 521427164 is about 804.8801508754.

The spelling of 521427164 in words is "five hundred twenty-one million, four hundred twenty-seven thousand, one hundred sixty-four".