22190915 has 4 divisors (see below), whose sum is σ = 26629104. Its totient is φ = 17752728.

The previous prime is 22190893. The next prime is 22190921. The reversal of 22190915 is 51909122.

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

It is a cyclic number.

It is not a de Polignac number, because 22190915 - 2²² = 17996611 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2219087 + ... + 2219096.

It is an arithmetic number, because the mean of its divisors is an integer number (6657276).

Almost surely, 2^22190915 is an apocalyptic number.

22190915 is a deficient number, since it is larger than the sum of its proper divisors (4438189).

22190915 is an equidigital number, since it uses as much as digits as its factorization.

22190915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4438188.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 22190915 is about 4710.7234051683. The cubic root of 22190915 is about 281.0121320480.

The spelling of 22190915 in words is "twenty-two million, one hundred ninety thousand, nine hundred fifteen".