222549993 has 12 divisors (see below), whose sum is σ = 322182900. Its totient is φ = 148033536.

The previous prime is 222549989. The next prime is 222550019. The reversal of 222549993 is 399945222.

It can be written as a sum of positive squares in 2 ways, for example, as 179345664 + 43204329 = 13392^2 + 6573^2 .

It is not a de Polignac number, because 222549993 - 2² = 222549989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222549923) 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 in 11 ways as a sum of consecutive naturals, for example, 23496 + ... + 31577.

It is an arithmetic number, because the mean of its divisors is an integer number (26848575).

Almost surely, 2^222549993 is an apocalyptic number.

It is an amenable number.

222549993 is a deficient number, since it is larger than the sum of its proper divisors (99632907).

222549993 is a wasteful number, since it uses less digits than its factorization.

222549993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55528 (or 55525 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 222549993 is about 14918.1095652231. The cubic root of 222549993 is about 606.0045174973.

The spelling of 222549993 in words is "two hundred twenty-two million, five hundred forty-nine thousand, nine hundred ninety-three".