222222137 has 2 divisors, whose sum is σ = 222222138. Its totient is φ = 222222136.

The previous prime is 222222131. The next prime is 222222139. The reversal of 222222137 is 731222222.

222222137 is nontrivially palindromic in base 9.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207043321 + 15178816 = 14389^2 + 3896^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222222137 is a prime.

Together with 222222139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (222222131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111111068 + 111111069.

It is an arithmetic number, because the mean of its divisors is an integer number (111111069).

Almost surely, 2^222222137 is an apocalyptic number.

It is an amenable number.

222222137 is a deficient number, since it is larger than the sum of its proper divisors (1).

222222137 is an equidigital number, since it uses as much as digits as its factorization.

222222137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 23.

The square root of 222222137 is about 14907.1169915581. The cubic root of 222222137 is about 605.7067868478.

Adding to 222222137 its reverse (731222222), we get a palindrome (953444359).

The spelling of 222222137 in words is "two hundred twenty-two million, two hundred twenty-two thousand, one hundred thirty-seven".