521995602317 has 16 divisors (see below), whose sum is σ = 614651023872. Its totient is φ = 434029827840.

The previous prime is 521995602283. The next prime is 521995602367. The reversal of 521995602317 is 713206599125.

It is not a de Polignac number, because 521995602317 - 2⁶ = 521995602253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521995602367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6983234 + ... + 7057587.

It is an arithmetic number, because the mean of its divisors is an integer number (38415688992).

Almost surely, 2^521995602317 is an apocalyptic number.

It is an amenable number.

521995602317 is a deficient number, since it is larger than the sum of its proper divisors (92655421555).

521995602317 is a wasteful number, since it uses less digits than its factorization.

521995602317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14040988.

The product of its (nonzero) digits is 1020600, while the sum is 50.

The spelling of 521995602317 in words is "five hundred twenty-one billion, nine hundred ninety-five million, six hundred two thousand, three hundred seventeen".