225637709 has 8 divisors (see below), whose sum is σ = 249824928. Its totient is φ = 202062960.

The previous prime is 225637697. The next prime is 225637717. The reversal of 225637709 is 907736522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225637709 - 2⁸ = 225637453 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 (225630709) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 152342 + ... + 153815.

It is an arithmetic number, because the mean of its divisors is an integer number (31228116).

Almost surely, 2^225637709 is an apocalyptic number.

It is an amenable number.

225637709 is a deficient number, since it is larger than the sum of its proper divisors (24187219).

225637709 is a wasteful number, since it uses less digits than its factorization.

225637709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306235.

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 225637709 is about 15021.2419260193. The cubic root of 225637709 is about 608.7942760488.

The spelling of 225637709 in words is "two hundred twenty-five million, six hundred thirty-seven thousand, seven hundred nine".