22131663 has 4 divisors (see below), whose sum is σ = 29508888. Its totient is φ = 14754440.

The previous prime is 22131649. The next prime is 22131673. The reversal of 22131663 is 36613122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 22131663 - 2⁴ = 22131647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3688608 + ... + 3688613.

It is an arithmetic number, because the mean of its divisors is an integer number (7377222).

Almost surely, 2^22131663 is an apocalyptic number.

22131663 is a deficient number, since it is larger than the sum of its proper divisors (7377225).

22131663 is an equidigital number, since it uses as much as digits as its factorization.

22131663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7377224.

The product of its digits is 1296, while the sum is 24.

The square root of 22131663 is about 4704.4301461495. The cubic root of 22131663 is about 280.7617987861.

Adding to 22131663 its reverse (36613122), we get a palindrome (58744785).

The spelling of 22131663 in words is "twenty-two million, one hundred thirty-one thousand, six hundred sixty-three".