521883668 has 24 divisors (see below), whose sum is σ = 947676072. Its totient is φ = 251265024.

The previous prime is 521883613. The next prime is 521883671. The reversal of 521883668 is 866388125.

It can be written as a sum of positive squares in 4 ways, for example, as 112954384 + 408929284 = 10628^2 + 20222^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3821 + ... + 32532.

It is an arithmetic number, because the mean of its divisors is an integer number (39486503).

Almost surely, 2^521883668 is an apocalyptic number.

It is an amenable number.

521883668 is a deficient number, since it is larger than the sum of its proper divisors (425792404).

521883668 is a wasteful number, since it uses less digits than its factorization.

521883668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36491 (or 36489 counting only the distinct ones).

The product of its digits is 552960, while the sum is 47.

The square root of 521883668 is about 22844.7733190767. The cubic root of 521883668 is about 805.1149703980.

The spelling of 521883668 in words is "five hundred twenty-one million, eight hundred eighty-three thousand, six hundred sixty-eight".