222898161 has 4 divisors (see below), whose sum is σ = 297197552. Its totient is φ = 148598772.

The previous prime is 222898121. The next prime is 222898163. The reversal of 222898161 is 161898222.

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 not a de Polignac number, because 222898161 - 2²² = 218703857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222898163) 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, 37149691 + ... + 37149696.

It is an arithmetic number, because the mean of its divisors is an integer number (74299388).

Almost surely, 2^222898161 is an apocalyptic number.

It is an amenable number.

222898161 is a deficient number, since it is larger than the sum of its proper divisors (74299391).

222898161 is an equidigital number, since it uses as much as digits as its factorization.

222898161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74299390.

The product of its digits is 27648, while the sum is 39.

The square root of 222898161 is about 14929.7743117570. The cubic root of 222898161 is about 606.3203737912.

The spelling of 222898161 in words is "two hundred twenty-two million, eight hundred ninety-eight thousand, one hundred sixty-one".