222512161 has 8 divisors (see below), whose sum is σ = 223823360. Its totient is φ = 221205168.

The previous prime is 222512131. The next prime is 222512177. The reversal of 222512161 is 161215222.

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

It is a cyclic number.

It is not a de Polignac number, because 222512161 - 2¹⁵ = 222479393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222512131) 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, 204160 + ... + 205246.

It is an arithmetic number, because the mean of its divisors is an integer number (27977920).

Almost surely, 2^222512161 is an apocalyptic number.

It is an amenable number.

222512161 is a deficient number, since it is larger than the sum of its proper divisors (1311199).

222512161 is a wasteful number, since it uses less digits than its factorization.

222512161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103.

The product of its digits is 480, while the sum is 22.

The square root of 222512161 is about 14916.8415222526. The cubic root of 222512161 is about 605.9701766557.

Adding to 222512161 its reverse (161215222), we get a palindrome (383727383).

The spelling of 222512161 in words is "two hundred twenty-two million, five hundred twelve thousand, one hundred sixty-one".