222222131 has 2 divisors, whose sum is σ = 222222132. Its totient is φ = 222222130.

The previous prime is 222222103. The next prime is 222222137. The reversal of 222222131 is 131222222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222222131 - 2²² = 218027827 is a prime.

It is a super-2 number, since 2×222222131² = 98765351012362322, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (222222137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111111065 + 111111066.

It is an arithmetic number, because the mean of its divisors is an integer number (111111066).

Almost surely, 2^222222131 is an apocalyptic number.

222222131 is a deficient number, since it is larger than the sum of its proper divisors (1).

222222131 is an equidigital number, since it uses as much as digits as its factorization.

222222131 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 222222131 is about 14907.1167903119. The cubic root of 222222131 is about 605.7067813965.

Adding to 222222131 its reverse (131222222), we get a palindrome (353444353).

Subtracting from 222222131 its reverse (131222222), we obtain a palindrome (90999909).

The spelling of 222222131 in words is "two hundred twenty-two million, two hundred twenty-two thousand, one hundred thirty-one".