522147388 has 12 divisors (see below), whose sum is σ = 1044294832. Its totient is φ = 223777440.

The previous prime is 522147359. The next prime is 522147413. The reversal of 522147388 is 883741225.

It is a happy number.

522147388 is an admirable number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 522147388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9324033 + ... + 9324088.

Almost surely, 2^522147388 is an apocalyptic number.

It is an amenable number.

522147388 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

522147388 is a wasteful number, since it uses less digits than its factorization.

522147388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18648132 (or 18648130 counting only the distinct ones).

The product of its digits is 107520, while the sum is 40.

The square root of 522147388 is about 22850.5445886963. The cubic root of 522147388 is about 805.2505620243.

The spelling of 522147388 in words is "five hundred twenty-two million, one hundred forty-seven thousand, three hundred eighty-eight".