225620031173 has 2 divisors, whose sum is σ = 225620031174. Its totient is φ = 225620031172.

The previous prime is 225620031157. The next prime is 225620031211. The reversal of 225620031173 is 371130026522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217545750724 + 8074280449 = 466418^2 + 89857^2 .

It is a cyclic number.

It is not a de Polignac number, because 225620031173 - 2⁴ = 225620031157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225620031073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112810015586 + 112810015587.

It is an arithmetic number, because the mean of its divisors is an integer number (112810015587).

Almost surely, 2^225620031173 is an apocalyptic number.

It is an amenable number.

225620031173 is a deficient number, since it is larger than the sum of its proper divisors (1).

225620031173 is an equidigital number, since it uses as much as digits as its factorization.

225620031173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

Adding to 225620031173 its reverse (371130026522), we get a palindrome (596750057695).

The spelling of 225620031173 in words is "two hundred twenty-five billion, six hundred twenty million, thirty-one thousand, one hundred seventy-three".