222416991 has 12 divisors (see below), whose sum is σ = 327331368. Its totient is φ = 145479984.

The previous prime is 222416989. The next prime is 222416993. The reversal of 222416991 is 199614222.

222416991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (222416989) and next prime (222416993).

It is not a de Polignac number, because 222416991 - 2¹ = 222416989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222416993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232665 + ... + 233618.

It is an arithmetic number, because the mean of its divisors is an integer number (27277614).

Almost surely, 2^222416991 is an apocalyptic number.

222416991 is a deficient number, since it is larger than the sum of its proper divisors (104914377).

222416991 is a wasteful number, since it uses less digits than its factorization.

222416991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466342 (or 466339 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 222416991 is about 14913.6511626094. The cubic root of 222416991 is about 605.8837717818.

The spelling of 222416991 in words is "two hundred twenty-two million, four hundred sixteen thousand, nine hundred ninety-one".