521964164 has 12 divisors (see below), whose sum is σ = 915673500. Its totient is φ = 260343168.

The previous prime is 521964151. The next prime is 521964167. The reversal of 521964164 is 461469125.

It can be written as a sum of positive squares in 2 ways, for example, as 368947264 + 153016900 = 19208^2 + 12370^2 .

It is not an unprimeable number, because it can be changed into a prime (521964167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157889 + ... + 161160.

It is an arithmetic number, because the mean of its divisors is an integer number (76306125).

Almost surely, 2^521964164 is an apocalyptic number.

It is an amenable number.

521964164 is a deficient number, since it is larger than the sum of its proper divisors (393709336).

521964164 is a wasteful number, since it uses less digits than its factorization.

521964164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319462 (or 319460 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 521964164 is about 22846.5350545767. The cubic root of 521964164 is about 805.1563622553.

The spelling of 521964164 in words is "five hundred twenty-one million, nine hundred sixty-four thousand, one hundred sixty-four".