224921969 has 4 divisors (see below), whose sum is σ = 224953344. Its totient is φ = 224890596.

The previous prime is 224921959. The next prime is 224922011. The reversal of 224921969 is 969129422.

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 224921969 - 2¹² = 224917873 is a prime.

It is a super-2 number, since 2×224921969² = 101179784277673922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (224921959) 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, 944 + ... + 21230.

It is an arithmetic number, because the mean of its divisors is an integer number (56238336).

Almost surely, 2^224921969 is an apocalyptic number.

It is an amenable number.

224921969 is a deficient number, since it is larger than the sum of its proper divisors (31375).

224921969 is a wasteful number, since it uses less digits than its factorization.

224921969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31374.

The product of its digits is 139968, while the sum is 44.

The square root of 224921969 is about 14997.3987411151. The cubic root of 224921969 is about 608.1498802716.

The spelling of 224921969 in words is "two hundred twenty-four million, nine hundred twenty-one thousand, nine hundred sixty-nine".