222212131 has 4 divisors (see below), whose sum is σ = 231873552. Its totient is φ = 212550712.

The previous prime is 222212129. The next prime is 222212147. The reversal of 222212131 is 131212222.

It is a happy number.

222212131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 222212131 - 2¹ = 222212129 is a prime.

It is a super-2 number, since 2×222212131² = 98756462327122322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222212161) 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, 4830676 + ... + 4830721.

It is an arithmetic number, because the mean of its divisors is an integer number (57968388).

Almost surely, 2^222212131 is an apocalyptic number.

222212131 is a deficient number, since it is larger than the sum of its proper divisors (9661421).

222212131 is an equidigital number, since it uses as much as digits as its factorization.

222212131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9661420.

The product of its digits is 96, while the sum is 16.

The square root of 222212131 is about 14906.7813762730. The cubic root of 222212131 is about 605.6976956547.

Adding to 222212131 its reverse (131212222), we get a palindrome (353424353).

Subtracting from 222212131 its reverse (131212222), we obtain a palindrome (90999909).

The spelling of 222212131 in words is "two hundred twenty-two million, two hundred twelve thousand, one hundred thirty-one".