225755657 has 2 divisors, whose sum is σ = 225755658. Its totient is φ = 225755656.

The previous prime is 225755641. The next prime is 225755659. The reversal of 225755657 is 756557522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194574601 + 31181056 = 13949^2 + 5584^2 .

It is a cyclic number.

It is not a de Polignac number, because 225755657 - 2⁴ = 225755641 is a prime.

Together with 225755659, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (225755659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112877828 + 112877829.

It is an arithmetic number, because the mean of its divisors is an integer number (112877829).

Almost surely, 2^225755657 is an apocalyptic number.

It is an amenable number.

225755657 is a deficient number, since it is larger than the sum of its proper divisors (1).

225755657 is an equidigital number, since it uses as much as digits as its factorization.

225755657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 735000, while the sum is 44.

The square root of 225755657 is about 15025.1674533098. The cubic root of 225755657 is about 608.9003362747.

The spelling of 225755657 in words is "two hundred twenty-five million, seven hundred fifty-five thousand, six hundred fifty-seven".