522004397 has 4 divisors (see below), whose sum is σ = 552710556. Its totient is φ = 491298240.

The previous prime is 522004361. The next prime is 522004411. The reversal of 522004397 is 793400225.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 424607236 + 97397161 = 20606^2 + 9869^2 .

It is a cyclic number.

It is not a de Polignac number, because 522004397 - 2²⁰ = 520955821 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 (522004097) 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, 15353054 + ... + 15353087.

It is an arithmetic number, because the mean of its divisors is an integer number (138177639).

Almost surely, 2^522004397 is an apocalyptic number.

It is an amenable number.

522004397 is a deficient number, since it is larger than the sum of its proper divisors (30706159).

522004397 is a wasteful number, since it uses less digits than its factorization.

522004397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30706158.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 522004397 is about 22847.4155431200. The cubic root of 522004397 is about 805.1770488758.

The spelling of 522004397 in words is "five hundred twenty-two million, four thousand, three hundred ninety-seven".