724421522 has 16 divisors (see below), whose sum is σ = 1186188192. Its totient is φ = 329068320.

The previous prime is 724421513. The next prime is 724421563. The reversal of 724421522 is 225124427.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26798 + ... + 46550.

It is an arithmetic number, because the mean of its divisors is an integer number (74136762).

Almost surely, 2^724421522 is an apocalyptic number.

724421522 is a deficient number, since it is larger than the sum of its proper divisors (461766670).

724421522 is a wasteful number, since it uses less digits than its factorization.

724421522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21433.

The product of its digits is 8960, while the sum is 29.

The square root of 724421522 is about 26915.0798252578. The cubic root of 724421522 is about 898.1118943973. Note that the first 3 decimals are identical.

Adding to 724421522 its reverse (225124427), we get a palindrome (949545949).

The spelling of 724421522 in words is "seven hundred twenty-four million, four hundred twenty-one thousand, five hundred twenty-two".