222531109 has 2 divisors, whose sum is σ = 222531110. Its totient is φ = 222531108.

The previous prime is 222531103. The next prime is 222531131. The reversal of 222531109 is 901135222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155700484 + 66830625 = 12478^2 + 8175^2 .

It is a cyclic number.

It is not a de Polignac number, because 222531109 - 2⁷ = 222530981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222531103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111265554 + 111265555.

It is an arithmetic number, because the mean of its divisors is an integer number (111265555).

Almost surely, 2^222531109 is an apocalyptic number.

It is an amenable number.

222531109 is a deficient number, since it is larger than the sum of its proper divisors (1).

222531109 is an equidigital number, since it uses as much as digits as its factorization.

222531109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 222531109 is about 14917.4766297789. The cubic root of 222531109 is about 605.9873766100.

The spelling of 222531109 in words is "two hundred twenty-two million, five hundred thirty-one thousand, one hundred nine".