22813491 has 4 divisors (see below), whose sum is σ = 30417992. Its totient is φ = 15208992.

The previous prime is 22813487. The next prime is 22813499. The reversal of 22813491 is 19431822.

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

It is not a de Polignac number, because 22813491 - 2² = 22813487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22813499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3802246 + ... + 3802251.

It is an arithmetic number, because the mean of its divisors is an integer number (7604498).

Almost surely, 2^22813491 is an apocalyptic number.

22813491 is a deficient number, since it is larger than the sum of its proper divisors (7604501).

22813491 is an equidigital number, since it uses as much as digits as its factorization.

22813491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7604500.

The product of its digits is 3456, while the sum is 30.

The square root of 22813491 is about 4776.3470351305. The cubic root of 22813491 is about 283.6159052525.

The spelling of 22813491 in words is "twenty-two million, eight hundred thirteen thousand, four hundred ninety-one".