22813997 has 4 divisors (see below), whose sum is σ = 22896636. Its totient is φ = 22731360.

The previous prime is 22813963. The next prime is 22814023. The reversal of 22813997 is 79931822.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8213956 + 14600041 = 2866^2 + 3821^2 .

It is a cyclic number.

It is not a de Polignac number, because 22813997 - 2¹⁴ = 22797613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22813937) 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, 40904 + ... + 41457.

It is an arithmetic number, because the mean of its divisors is an integer number (5724159).

Almost surely, 2^22813997 is an apocalyptic number.

It is an amenable number.

22813997 is a deficient number, since it is larger than the sum of its proper divisors (82639).

22813997 is an equidigital number, since it uses as much as digits as its factorization.

22813997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82638.

The product of its digits is 54432, while the sum is 41.

The square root of 22813997 is about 4776.4000041873. The cubic root of 22813997 is about 283.6180020906.

The spelling of 22813997 in words is "twenty-two million, eight hundred thirteen thousand, nine hundred ninety-seven".