222347431 has 2 divisors, whose sum is σ = 222347432. Its totient is φ = 222347430.

The previous prime is 222347413. The next prime is 222347449. The reversal of 222347431 is 134743222.

Together with previous prime (222347413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (222347413) and next prime (222347449).

It is a cyclic number.

It is not a de Polignac number, because 222347431 - 2¹⁵ = 222314663 is a prime.

It is a super-2 number, since 2×222347431² = 98876760144599522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 222347431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222347231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111173715 + 111173716.

It is an arithmetic number, because the mean of its divisors is an integer number (111173716).

Almost surely, 2^222347431 is an apocalyptic number.

222347431 is a deficient number, since it is larger than the sum of its proper divisors (1).

222347431 is an equidigital number, since it uses as much as digits as its factorization.

222347431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 28.

The square root of 222347431 is about 14911.3188886832. The cubic root of 222347431 is about 605.8206026427.

It can be divided in two parts, 222347 and 431, that added together give a triangular number (222778 = T₆₆₇).

The spelling of 222347431 in words is "two hundred twenty-two million, three hundred forty-seven thousand, four hundred thirty-one".