225163939 has 40 divisors (see below), whose sum is σ = 306639200. Its totient is φ = 161956080.

The previous prime is 225163909. The next prime is 225163949. The reversal of 225163939 is 939361522.

It is not a de Polignac number, because 225163939 - 2¹¹ = 225161891 is a prime.

Its product of digits (87480) is a multiple of the sum of its prime factors (90).

It is not an unprimeable number, because it can be changed into a prime (225163909) 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 39 ways as a sum of consecutive naturals, for example, 17320297 + ... + 17320309.

It is an arithmetic number, because the mean of its divisors is an integer number (7665980).

Almost surely, 2^225163939 is an apocalyptic number.

225163939 is a deficient number, since it is larger than the sum of its proper divisors (81475261).

225163939 is an frugal number, since it uses more digits than its factorization.

225163939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90 (or 31 counting only the distinct ones).

The product of its digits is 87480, while the sum is 40.

The square root of 225163939 is about 15005.4636382886. The cubic root of 225163939 is about 608.3678837114.

The spelling of 225163939 in words is "two hundred twenty-five million, one hundred sixty-three thousand, nine hundred thirty-nine".