222499999 has 4 divisors (see below), whose sum is σ = 232173936. Its totient is φ = 212826064.

The previous prime is 222499987. The next prime is 222500023. The reversal of 222499999 is 999994222.

222499999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999994222 = 2 ⋅499997111.

It is a cyclic number.

It is not a de Polignac number, because 222499999 - 2⁵ = 222499967 is a prime.

It is a Duffinian number.

222499999 is a modest number, since divided by 99999 gives 2224 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222499969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4836934 + ... + 4836979.

It is an arithmetic number, because the mean of its divisors is an integer number (58043484).

Almost surely, 2^222499999 is an apocalyptic number.

222499999 is a deficient number, since it is larger than the sum of its proper divisors (9673937).

222499999 is an equidigital number, since it uses as much as digits as its factorization.

222499999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9673936.

The product of its digits is 1889568, while the sum is 55.

The square root of 222499999 is about 14916.4338566562. The cubic root of 222499999 is about 605.9591361452.

The spelling of 222499999 in words is "two hundred twenty-two million, four hundred ninety-nine thousand, nine hundred ninety-nine".