222100161 has 4 divisors (see below), whose sum is σ = 296133552. Its totient is φ = 148066772.

The previous prime is 222100129. The next prime is 222100169. The reversal of 222100161 is 161001222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 222100161 - 2⁵ = 222100129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222100161.

It is not an unprimeable number, because it can be changed into a prime (222100169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37016691 + ... + 37016696.

It is an arithmetic number, because the mean of its divisors is an integer number (74033388).

Almost surely, 2^222100161 is an apocalyptic number.

It is an amenable number.

222100161 is a deficient number, since it is larger than the sum of its proper divisors (74033391).

222100161 is an equidigital number, since it uses as much as digits as its factorization.

222100161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74033390.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 222100161 is about 14903.0252297981. The cubic root of 222100161 is about 605.5959439861.

Adding to 222100161 its reverse (161001222), we get a palindrome (383101383).

The spelling of 222100161 in words is "two hundred twenty-two million, one hundred thousand, one hundred sixty-one".