521703164 has 12 divisors (see below), whose sum is σ = 915430824. Its totient is φ = 260151504.

The previous prime is 521703163. The next prime is 521703199. The reversal of 521703164 is 461307125.

It is a super-2 number, since 2×521703164² = 544348382655221792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521703163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173342 + ... + 176325.

It is an arithmetic number, because the mean of its divisors is an integer number (76285902).

Almost surely, 2^521703164 is an apocalyptic number.

It is an amenable number.

521703164 is a deficient number, since it is larger than the sum of its proper divisors (393727660).

521703164 is a wasteful number, since it uses less digits than its factorization.

521703164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350044 (or 350042 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 521703164 is about 22840.8223144439. The cubic root of 521703164 is about 805.0221379404.

The spelling of 521703164 in words is "five hundred twenty-one million, seven hundred three thousand, one hundred sixty-four".