222173431 has 2 divisors, whose sum is σ = 222173432. Its totient is φ = 222173430.

The previous prime is 222173429. The next prime is 222173443. The reversal of 222173431 is 134371222.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222173431 - 2¹ = 222173429 is a prime.

It is a super-2 number, since 2×222173431² = 98722066884623522, which contains 22 as substring.

Together with 222173429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 222173396 and 222173405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222173531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111086715 + 111086716.

It is an arithmetic number, because the mean of its divisors is an integer number (111086716).

Almost surely, 2^222173431 is an apocalyptic number.

222173431 is a deficient number, since it is larger than the sum of its proper divisors (1).

222173431 is an equidigital number, since it uses as much as digits as its factorization.

222173431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 25.

The square root of 222173431 is about 14905.4832528167. The cubic root of 222173431 is about 605.6625312653.

The spelling of 222173431 in words is "two hundred twenty-two million, one hundred seventy-three thousand, four hundred thirty-one".