521521883167 has 4 divisors (see below), whose sum is σ = 525628354816. Its totient is φ = 517415411520.

The previous prime is 521521883131. The next prime is 521521883191. The reversal of 521521883167 is 761388125125.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521521883167 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 521521883167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521521883867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053235634 + ... + 2053235887.

It is an arithmetic number, because the mean of its divisors is an integer number (131407088704).

Almost surely, 2^521521883167 is an apocalyptic number.

521521883167 is a deficient number, since it is larger than the sum of its proper divisors (4106471649).

521521883167 is a wasteful number, since it uses less digits than its factorization.

521521883167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106471648.

The product of its digits is 806400, while the sum is 49.

The spelling of 521521883167 in words is "five hundred twenty-one billion, five hundred twenty-one million, eight hundred eighty-three thousand, one hundred sixty-seven".