225366161 has 8 divisors (see below), whose sum is σ = 238815720. Its totient is φ = 211938048.

The previous prime is 225366157. The next prime is 225366203. The reversal of 225366161 is 161663522.

225366161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 42981136 + 182385025 = 6556^2 + 13505^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225366161 - 2² = 225366157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225366101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19655 + ... + 28931.

It is an arithmetic number, because the mean of its divisors is an integer number (29851965).

Almost surely, 2^225366161 is an apocalyptic number.

It is an amenable number.

225366161 is a deficient number, since it is larger than the sum of its proper divisors (13449559).

225366161 is a wasteful number, since it uses less digits than its factorization.

225366161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10723.

The product of its digits is 12960, while the sum is 32.

The square root of 225366161 is about 15012.2004050039. The cubic root of 225366161 is about 608.5499563219.

The spelling of 225366161 in words is "two hundred twenty-five million, three hundred sixty-six thousand, one hundred sixty-one".