222712161 has 16 divisors (see below), whose sum is σ = 344153088. Its totient is φ = 125470800.

The previous prime is 222712117. The next prime is 222712177. The reversal of 222712161 is 161217222.

It is not a de Polignac number, because 222712161 - 2⁹ = 222711649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222712181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73195 + ... + 76176.

It is an arithmetic number, because the mean of its divisors is an integer number (21509568).

Almost surely, 2^222712161 is an apocalyptic number.

222712161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222712161 is a deficient number, since it is larger than the sum of its proper divisors (121440927).

222712161 is a wasteful number, since it uses less digits than its factorization.

222712161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149452.

The product of its digits is 672, while the sum is 24.

The square root of 222712161 is about 14923.5438485636. The cubic root of 222712161 is about 606.1516764624.

Adding to 222712161 its reverse (161217222), we get a palindrome (383929383).

The spelling of 222712161 in words is "two hundred twenty-two million, seven hundred twelve thousand, one hundred sixty-one".