225204021023 has 2 divisors, whose sum is σ = 225204021024. Its totient is φ = 225204021022.

The previous prime is 225204021019. The next prime is 225204021059. The reversal of 225204021023 is 320120402522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225204021023 - 2² = 225204021019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225204021023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225204026023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112602010511 + 112602010512.

It is an arithmetic number, because the mean of its divisors is an integer number (112602010512).

Almost surely, 2^225204021023 is an apocalyptic number.

225204021023 is a deficient number, since it is larger than the sum of its proper divisors (1).

225204021023 is an equidigital number, since it uses as much as digits as its factorization.

225204021023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 225204021023 its reverse (320120402522), we get a palindrome (545324423545).

The spelling of 225204021023 in words is "two hundred twenty-five billion, two hundred four million, twenty-one thousand, twenty-three".