522157879 has 4 divisors (see below), whose sum is σ = 524342880. Its totient is φ = 519972880.

The previous prime is 522157877. The next prime is 522157903. The reversal of 522157879 is 978751225.

It is a happy number.

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 522157879 - 2¹ = 522157877 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 (522157871) 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, 1092142 + ... + 1092619.

It is an arithmetic number, because the mean of its divisors is an integer number (131085720).

Almost surely, 2^522157879 is an apocalyptic number.

522157879 is a deficient number, since it is larger than the sum of its proper divisors (2185001).

522157879 is a wasteful number, since it uses less digits than its factorization.

522157879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185000.

The product of its digits is 352800, while the sum is 46.

The square root of 522157879 is about 22850.7741444355. The cubic root of 522157879 is about 805.2559550271.

The spelling of 522157879 in words is "five hundred twenty-two million, one hundred fifty-seven thousand, eight hundred seventy-nine".