225997111 has 2 divisors, whose sum is σ = 225997112. Its totient is φ = 225997110.

The previous prime is 225997069. The next prime is 225997151. The reversal of 225997111 is 111799522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225997111 - 2⁷ = 225996983 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225997151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112998555 + 112998556.

It is an arithmetic number, because the mean of its divisors is an integer number (112998556).

Almost surely, 2^225997111 is an apocalyptic number.

225997111 is a deficient number, since it is larger than the sum of its proper divisors (1).

225997111 is an equidigital number, since it uses as much as digits as its factorization.

225997111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 37.

The square root of 225997111 is about 15033.2002913551. The cubic root of 225997111 is about 609.1173393831.

The spelling of 225997111 in words is "two hundred twenty-five million, nine hundred ninety-seven thousand, one hundred eleven".