225403999 has 2 divisors, whose sum is σ = 225404000. Its totient is φ = 225403998.

The previous prime is 225403961. The next prime is 225404009. The reversal of 225403999 is 999304522.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225403999 - 2¹⁵ = 225371231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225403939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112701999 + 112702000.

It is an arithmetic number, because the mean of its divisors is an integer number (112702000).

Almost surely, 2^225403999 is an apocalyptic number.

225403999 is a deficient number, since it is larger than the sum of its proper divisors (1).

225403999 is an equidigital number, since it uses as much as digits as its factorization.

225403999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 225403999 is about 15013.4605937472. The cubic root of 225403999 is about 608.5840120479.

The spelling of 225403999 in words is "two hundred twenty-five million, four hundred three thousand, nine hundred ninety-nine".