22212491 has 8 divisors (see below), whose sum is σ = 25580544. Its totient is φ = 18893160.

The previous prime is 22212439. The next prime is 22212527. The reversal of 22212491 is 19421222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22212491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22212401) 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, 11195 + ... + 13028.

It is an arithmetic number, because the mean of its divisors is an integer number (3197568).

Almost surely, 2^22212491 is an apocalyptic number.

22212491 is a deficient number, since it is larger than the sum of its proper divisors (3368053).

22212491 is a wasteful number, since it uses less digits than its factorization.

22212491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24361.

The product of its digits is 576, while the sum is 23.

The square root of 22212491 is about 4713.0129429061. The cubic root of 22212491 is about 281.1031776220.

The spelling of 22212491 in words is "twenty-two million, two hundred twelve thousand, four hundred ninety-one".