522447409 has 4 divisors (see below), whose sum is σ = 569942640. Its totient is φ = 474952180.

The previous prime is 522447407. The next prime is 522447481. The reversal of 522447409 is 904744225.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 522447409 - 2¹ = 522447407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (522447407) 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, 23747599 + ... + 23747620.

It is an arithmetic number, because the mean of its divisors is an integer number (142485660).

Almost surely, 2^522447409 is an apocalyptic number.

It is an amenable number.

522447409 is a deficient number, since it is larger than the sum of its proper divisors (47495231).

522447409 is a wasteful number, since it uses less digits than its factorization.

522447409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47495230.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 522447409 is about 22857.1085004206. The cubic root of 522447409 is about 805.4047623050.

It can be divided in two parts, 522 and 447409, that added together give a triangular number (447931 = T₉₄₆).

The spelling of 522447409 in words is "five hundred twenty-two million, four hundred forty-seven thousand, four hundred nine".