225440101 has 2 divisors, whose sum is σ = 225440102. Its totient is φ = 225440100.

The previous prime is 225440057. The next prime is 225440107. The reversal of 225440101 is 101044522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211557025 + 13883076 = 14545^2 + 3726^2 .

It is a cyclic number.

It is not a de Polignac number, because 225440101 - 2²⁵ = 191885669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225440107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112720050 + 112720051.

It is an arithmetic number, because the mean of its divisors is an integer number (112720051).

Almost surely, 2^225440101 is an apocalyptic number.

It is an amenable number.

225440101 is a deficient number, since it is larger than the sum of its proper divisors (1).

225440101 is an equidigital number, since it uses as much as digits as its factorization.

225440101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 225440101 is about 15014.6628666780. The cubic root of 225440101 is about 608.6165017511.

Adding to 225440101 its reverse (101044522), we get a palindrome (326484623).

The spelling of 225440101 in words is "two hundred twenty-five million, four hundred forty thousand, one hundred one".