225522642236161 has 4 divisors (see below), whose sum is σ = 225522853104132. Its totient is φ = 225522431368192.

The previous prime is 225522642236159. The next prime is 225522642236231. The reversal of 225522642236161 is 161632246225522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 163742350554225 + 61780291681936 = 12796185^2 + 7860044^2 .

It is a cyclic number.

It is not a de Polignac number, because 225522642236161 - 2¹ = 225522642236159 is a prime.

It is a super-2 number, since 2×225522642236161² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225522642236461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103821520 + ... + 105971473.

It is an arithmetic number, because the mean of its divisors is an integer number (56380713276033).

Almost surely, 2^{225522642236161} is an apocalyptic number.

It is an amenable number.

225522642236161 is a deficient number, since it is larger than the sum of its proper divisors (210867971).

225522642236161 is a wasteful number, since it uses less digits than its factorization.

225522642236161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210867970.

The product of its digits is 4147200, while the sum is 49.

The spelling of 225522642236161 in words is "two hundred twenty-five trillion, five hundred twenty-two billion, six hundred forty-two million, two hundred thirty-six thousand, one hundred sixty-one".