225994989901 has 2 divisors, whose sum is σ = 225994989902. Its totient is φ = 225994989900.

The previous prime is 225994989893. The next prime is 225994989931. The reversal of 225994989901 is 109989499522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223043675625 + 2951314276 = 472275^2 + 54326^2 .

It is a cyclic number.

It is not a de Polignac number, because 225994989901 - 2³ = 225994989893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225994989931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112997494950 + 112997494951.

It is an arithmetic number, because the mean of its divisors is an integer number (112997494951).

Almost surely, 2^225994989901 is an apocalyptic number.

It is an amenable number.

225994989901 is a deficient number, since it is larger than the sum of its proper divisors (1).

225994989901 is an equidigital number, since it uses as much as digits as its factorization.

225994989901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37791360, while the sum is 67.

The spelling of 225994989901 in words is "two hundred twenty-five billion, nine hundred ninety-four million, nine hundred eighty-nine thousand, nine hundred one".