22216091 has 8 divisors (see below), whose sum is σ = 23444640. Its totient is φ = 21009472.

The previous prime is 22216087. The next prime is 22216097. The reversal of 22216091 is 19061222.

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

It is a cyclic number.

It is not a de Polignac number, because 22216091 - 2² = 22216087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22216097) 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, 3380 + ... + 7473.

It is an arithmetic number, because the mean of its divisors is an integer number (2930580).

Almost surely, 2^22216091 is an apocalyptic number.

22216091 is a deficient number, since it is larger than the sum of its proper divisors (1228549).

22216091 is a wasteful number, since it uses less digits than its factorization.

22216091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10965.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 22216091 is about 4713.3948487263. The cubic root of 22216091 is about 281.1183630234.

The spelling of 22216091 in words is "twenty-two million, two hundred sixteen thousand, ninety-one".