222131431 has 2 divisors, whose sum is σ = 222131432. Its totient is φ = 222131430.

The previous prime is 222131417. The next prime is 222131443. The reversal of 222131431 is 134131222.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222131431 - 2¹⁹ = 221607143 is a prime.

It is a super-2 number, since 2×222131431² = 98684745276215522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 222131399 and 222131408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222131491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111065715 + 111065716.

It is an arithmetic number, because the mean of its divisors is an integer number (111065716).

Almost surely, 2^222131431 is an apocalyptic number.

222131431 is a deficient number, since it is larger than the sum of its proper divisors (1).

222131431 is an equidigital number, since it uses as much as digits as its factorization.

222131431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 19.

The square root of 222131431 is about 14904.0743087251. The cubic root of 222131431 is about 605.6243637411.

Adding to 222131431 its reverse (134131222), we get a palindrome (356262653).

The spelling of 222131431 in words is "two hundred twenty-two million, one hundred thirty-one thousand, four hundred thirty-one".