225205724 has 12 divisors (see below), whose sum is σ = 395577000. Its totient is φ = 112183728.

The previous prime is 225205703. The next prime is 225205733. The reversal of 225205724 is 427502522.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103574 + ... + 105725.

It is an arithmetic number, because the mean of its divisors is an integer number (32964750).

Almost surely, 2^225205724 is an apocalyptic number.

It is an amenable number.

225205724 is a deficient number, since it is larger than the sum of its proper divisors (170371276).

225205724 is a wasteful number, since it uses less digits than its factorization.

225205724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209572 (or 209570 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 29.

The square root of 225205724 is about 15006.8558998879. The cubic root of 225205724 is about 608.4055141891.

The spelling of 225205724 in words is "two hundred twenty-five million, two hundred five thousand, seven hundred twenty-four".