225040931 has 2 divisors, whose sum is σ = 225040932. Its totient is φ = 225040930.

The previous prime is 225040913. The next prime is 225040943. The reversal of 225040931 is 139040522.

Together with previous prime (225040913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225040931 - 2¹⁰ = 225039907 is a prime.

It is a super-2 number, since 2×225040931² = 101286841250693522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225040931.

It is not a weakly prime, because it can be changed into another prime (225040331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112520465 + 112520466.

It is an arithmetic number, because the mean of its divisors is an integer number (112520466).

Almost surely, 2^225040931 is an apocalyptic number.

225040931 is a deficient number, since it is larger than the sum of its proper divisors (1).

225040931 is an equidigital number, since it uses as much as digits as its factorization.

225040931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 225040931 is about 15001.3643046224. The cubic root of 225040931 is about 608.2570788930.

The spelling of 225040931 in words is "two hundred twenty-five million, forty thousand, nine hundred thirty-one".