400224522 has 32 divisors (see below), whose sum is σ = 811806912. Its totient is φ = 131526144.

The previous prime is 400224511. The next prime is 400224529. The reversal of 400224522 is 225422004.

It is not an unprimeable number, because it can be changed into a prime (400224529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169353 + ... + 171699.

It is an arithmetic number, because the mean of its divisors is an integer number (25368966).

Almost surely, 2^400224522 is an apocalyptic number.

400224522 is an abundant number, since it is smaller than the sum of its proper divisors (411582390).

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

400224522 is a wasteful number, since it uses less digits than its factorization.

400224522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 400224522 is about 20005.6122625627. The cubic root of 400224522 is about 736.9441316294.

Adding to 400224522 its reverse (225422004), we get a palindrome (625646526).

It can be divided in two parts, 40022 and 4522, that added together give a palindrome (44544).

The spelling of 400224522 in words is "four hundred million, two hundred twenty-four thousand, five hundred twenty-two".