225724816 has 10 divisors (see below), whose sum is σ = 437341862. Its totient is φ = 112862400.

The previous prime is 225724787. The next prime is 225724823. The reversal of 225724816 is 618427522.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 216090000 + 9634816 = 14700^2 + 3104^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7053885 + ... + 7053916.

Almost surely, 2^225724816 is an apocalyptic number.

It is an amenable number.

225724816 is a deficient number, since it is larger than the sum of its proper divisors (211617046).

225724816 is a wasteful number, since it uses less digits than its factorization.

225724816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14107809 (or 14107803 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 225724816 is about 15024.1411068986. The cubic root of 225724816 is about 608.8726072530.

The spelling of 225724816 in words is "two hundred twenty-five million, seven hundred twenty-four thousand, eight hundred sixteen".