224436921 has 16 divisors (see below), whose sum is σ = 313528320. Its totient is φ = 142538000.

The previous prime is 224436917. The next prime is 224436937. The reversal of 224436921 is 129634422.

It is a cyclic number.

It is not a de Polignac number, because 224436921 - 2² = 224436917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (224416921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10840 + ... + 23798.

It is an arithmetic number, because the mean of its divisors is an integer number (19595520).

Almost surely, 2^224436921 is an apocalyptic number.

It is an amenable number.

224436921 is a deficient number, since it is larger than the sum of its proper divisors (89091399).

224436921 is a wasteful number, since it uses less digits than its factorization.

224436921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13236.

The product of its digits is 20736, while the sum is 33.

The square root of 224436921 is about 14981.2189423958. The cubic root of 224436921 is about 607.7124038387.

The spelling of 224436921 in words is "two hundred twenty-four million, four hundred thirty-six thousand, nine hundred twenty-one".