224431621 has 4 divisors (see below), whose sum is σ = 224463744. Its totient is φ = 224399500.

The previous prime is 224431601. The next prime is 224431633. The reversal of 224431621 is 126134422.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 224431621 - 2⁵ = 224431589 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 (224431601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655 + ... + 21196.

It is an arithmetic number, because the mean of its divisors is an integer number (56115936).

Almost surely, 2^224431621 is an apocalyptic number.

It is an amenable number.

224431621 is a deficient number, since it is larger than the sum of its proper divisors (32123).

224431621 is a wasteful number, since it uses less digits than its factorization.

224431621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32122.

The product of its digits is 2304, while the sum is 25.

The square root of 224431621 is about 14981.0420532084. The cubic root of 224431621 is about 607.7076201619.

The spelling of 224431621 in words is "two hundred twenty-four million, four hundred thirty-one thousand, six hundred twenty-one".