222399706 has 4 divisors (see below), whose sum is σ = 333599562. Its totient is φ = 111199852.

The previous prime is 222399691. The next prime is 222399721. The reversal of 222399706 is 607993222.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (222399691) and next prime (222399721).

It can be written as a sum of positive squares in only one way, i.e., 215943025 + 6456681 = 14695^2 + 2541^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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, 55599925 + ... + 55599928.

Almost surely, 2^222399706 is an apocalyptic number.

222399706 is a deficient number, since it is larger than the sum of its proper divisors (111199856).

222399706 is a wasteful number, since it uses less digits than its factorization.

222399706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111199855.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 222399706 is about 14913.0716487248. The cubic root of 222399706 is about 605.8680760800.

The spelling of 222399706 in words is "two hundred twenty-two million, three hundred ninety-nine thousand, seven hundred six".