22142231 has 2 divisors, whose sum is σ = 22142232. Its totient is φ = 22142230.

The previous prime is 22142213. The next prime is 22142257. The reversal of 22142231 is 13224122.

Together with previous prime (22142213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22142231 is a prime.

It is a super-2 number, since 2×22142231² = 980556787314722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22147231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11071115 + 11071116.

It is an arithmetic number, because the mean of its divisors is an integer number (11071116).

Almost surely, 2^22142231 is an apocalyptic number.

22142231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22142231 is an equidigital number, since it uses as much as digits as its factorization.

22142231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 17.

The square root of 22142231 is about 4705.5532087099. The cubic root of 22142231 is about 280.8064801482.

Adding to 22142231 its reverse (13224122), we get a palindrome (35366353).

The spelling of 22142231 in words is "twenty-two million, one hundred forty-two thousand, two hundred thirty-one".