225525889 has 2 divisors, whose sum is σ = 225525890. Its totient is φ = 225525888.

The previous prime is 225525869. The next prime is 225525901. The reversal of 225525889 is 988525522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164685889 + 60840000 = 12833^2 + 7800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225525889 is a prime.

It is not a weakly prime, because it can be changed into another prime (225525809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112762944 + 112762945.

It is an arithmetic number, because the mean of its divisors is an integer number (112762945).

Almost surely, 2^225525889 is an apocalyptic number.

It is an amenable number.

225525889 is a deficient number, since it is larger than the sum of its proper divisors (1).

225525889 is an equidigital number, since it uses as much as digits as its factorization.

225525889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576000, while the sum is 46.

The square root of 225525889 is about 15017.5194023514. The cubic root of 225525889 is about 608.6936920569.

It can be divided in two parts, 22552 and 5889, that added together give a triangular number (28441 = T₂₃₈).

The spelling of 225525889 in words is "two hundred twenty-five million, five hundred twenty-five thousand, eight hundred eighty-nine".