225636401 has 2 divisors, whose sum is σ = 225636402. Its totient is φ = 225636400.

The previous prime is 225636373. The next prime is 225636421. The reversal of 225636401 is 104636522.

225636401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142826401 + 82810000 = 11951^2 + 9100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225636401 is a prime.

It is not a weakly prime, because it can be changed into another prime (225636421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112818200 + 112818201.

It is an arithmetic number, because the mean of its divisors is an integer number (112818201).

Almost surely, 2^225636401 is an apocalyptic number.

It is an amenable number.

225636401 is a deficient number, since it is larger than the sum of its proper divisors (1).

225636401 is an equidigital number, since it uses as much as digits as its factorization.

225636401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 225636401 is about 15021.1983876121. The cubic root of 225636401 is about 608.7930996727.

The spelling of 225636401 in words is "two hundred twenty-five million, six hundred thirty-six thousand, four hundred one".