521879567 has 4 divisors (see below), whose sum is σ = 569323176. Its totient is φ = 474435960.

The previous prime is 521879557. The next prime is 521879569. The reversal of 521879567 is 765978125.

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

It is a cyclic number.

It is not a de Polignac number, because 521879567 - 2⁴ = 521879551 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 (521879569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23721788 + ... + 23721809.

It is an arithmetic number, because the mean of its divisors is an integer number (142330794).

Almost surely, 2^521879567 is an apocalyptic number.

521879567 is a deficient number, since it is larger than the sum of its proper divisors (47443609).

521879567 is a wasteful number, since it uses less digits than its factorization.

521879567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47443608.

The product of its digits is 1058400, while the sum is 50.

The square root of 521879567 is about 22844.6835609513. The cubic root of 521879567 is about 805.1128615084.

It can be divided in two parts, 521 and 879567, that added together give a palindrome (880088).

The spelling of 521879567 in words is "five hundred twenty-one million, eight hundred seventy-nine thousand, five hundred sixty-seven".