522221687 has 8 divisors (see below), whose sum is σ = 564584496. Its totient is φ = 480172032.

The previous prime is 522221681. The next prime is 522221717. The reversal of 522221687 is 786122225.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 522221687 - 2⁸ = 522221431 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 (522221681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74813 + ... + 81494.

It is an arithmetic number, because the mean of its divisors is an integer number (70573062).

Almost surely, 2^522221687 is an apocalyptic number.

522221687 is a deficient number, since it is larger than the sum of its proper divisors (42362809).

522221687 is a wasteful number, since it uses less digits than its factorization.

522221687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156577.

The product of its digits is 26880, while the sum is 35.

The square root of 522221687 is about 22852.1702908061. The cubic root of 522221687 is about 805.2887546083.

The spelling of 522221687 in words is "five hundred twenty-two million, two hundred twenty-one thousand, six hundred eighty-seven".