22229291 has 6 divisors (see below), whose sum is σ = 25858620. Its totient is φ = 19053636.

The previous prime is 22229287. The next prime is 22229299. The reversal of 22229291 is 19292222.

It is not a de Polignac number, because 22229291 - 2² = 22229287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22229299) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 226781 + ... + 226878.

It is an arithmetic number, because the mean of its divisors is an integer number (4309770).

Almost surely, 2^22229291 is an apocalyptic number.

22229291 is a deficient number, since it is larger than the sum of its proper divisors (3629329).

22229291 is an equidigital number, since it uses as much as digits as its factorization.

22229291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453673 (or 453666 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 22229291 is about 4714.7949054015. The cubic root of 22229291 is about 281.1740287974.

It can be divided in two parts, 2222 and 9291, that multiplied together give a palindrome (20644602).

The spelling of 22229291 in words is "twenty-two million, two hundred twenty-nine thousand, two hundred ninety-one".