22220291 has 8 divisors (see below), whose sum is σ = 23463120. Its totient is φ = 20984832.

The previous prime is 22220281. The next prime is 22220299. The reversal of 22220291 is 19202222.

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 22220291 - 2⁶ = 22220227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22220299) 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, 5051 + ... + 8363.

It is an arithmetic number, because the mean of its divisors is an integer number (2932890).

Almost surely, 2^22220291 is an apocalyptic number.

22220291 is a deficient number, since it is larger than the sum of its proper divisors (1242829).

22220291 is a wasteful number, since it uses less digits than its factorization.

22220291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3685.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 22220291 is about 4713.8403664104. The cubic root of 22220291 is about 281.1360772518.

The spelling of 22220291 in words is "twenty-two million, two hundred twenty thousand, two hundred ninety-one".