225744709 has 4 divisors (see below), whose sum is σ = 225882604. Its totient is φ = 225606816.

The previous prime is 225744707. The next prime is 225744737. The reversal of 225744709 is 907447522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88924900 + 136819809 = 9430^2 + 11697^2 .

It is a cyclic number.

It is not a de Polignac number, because 225744709 - 2¹ = 225744707 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 (225744703) 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, 66462 + ... + 69775.

It is an arithmetic number, because the mean of its divisors is an integer number (56470651).

Almost surely, 2^225744709 is an apocalyptic number.

It is an amenable number.

225744709 is a deficient number, since it is larger than the sum of its proper divisors (137895).

225744709 is a wasteful number, since it uses less digits than its factorization.

225744709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137894.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 225744709 is about 15024.8031268300. The cubic root of 225744709 is about 608.8904932601.

The spelling of 225744709 in words is "two hundred twenty-five million, seven hundred forty-four thousand, seven hundred nine".