222216131 has 4 divisors (see below), whose sum is σ = 227383992. Its totient is φ = 217048272.

The previous prime is 222216119. The next prime is 222216151. The reversal of 222216131 is 131612222.

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 222216131 - 2¹⁸ = 221953987 is a prime.

It is a super-2 number, since 2×222216131² = 98760017753218322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222216151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2583866 + ... + 2583951.

It is an arithmetic number, because the mean of its divisors is an integer number (56845998).

Almost surely, 2^222216131 is an apocalyptic number.

222216131 is a deficient number, since it is larger than the sum of its proper divisors (5167861).

222216131 is an equidigital number, since it uses as much as digits as its factorization.

222216131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5167860.

The product of its digits is 288, while the sum is 20.

The square root of 222216131 is about 14906.9155427942. The cubic root of 222216131 is about 605.7013299841.

Adding to 222216131 its reverse (131612222), we get a palindrome (353828353).

The spelling of 222216131 in words is "two hundred twenty-two million, two hundred sixteen thousand, one hundred thirty-one".