222899991 has 8 divisors (see below), whose sum is σ = 303523584. Its totient is φ = 145438200.

The previous prime is 222899987. The next prime is 222899993. The reversal of 222899991 is 199998222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 222899991 - 2² = 222899987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222899993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 790285 + ... + 790566.

It is an arithmetic number, because the mean of its divisors is an integer number (37940448).

Almost surely, 2^222899991 is an apocalyptic number.

222899991 is a deficient number, since it is larger than the sum of its proper divisors (80623593).

222899991 is a wasteful number, since it uses less digits than its factorization.

222899991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580901.

The product of its digits is 419904, while the sum is 51.

The square root of 222899991 is about 14929.8355985590. The cubic root of 222899991 is about 606.3220330889.

The spelling of 222899991 in words is "two hundred twenty-two million, eight hundred ninety-nine thousand, nine hundred ninety-one".