22304631 has 4 divisors (see below), whose sum is σ = 29739512. Its totient is φ = 14869752.

The previous prime is 22304617. The next prime is 22304647. The reversal of 22304631 is 13640322.

It is a happy number.

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

It is not a de Polignac number, because 22304631 - 2¹⁰ = 22303607 is a prime.

It is a super-2 number, since 2×22304631² = 994993128092322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22304598 and 22304607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22304671) 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, 3717436 + ... + 3717441.

It is an arithmetic number, because the mean of its divisors is an integer number (7434878).

Almost surely, 2^22304631 is an apocalyptic number.

22304631 is a deficient number, since it is larger than the sum of its proper divisors (7434881).

22304631 is an equidigital number, since it uses as much as digits as its factorization.

22304631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7434880.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 22304631 is about 4722.7778901829. Note that the first 3 decimals coincide. The cubic root of 22304631 is about 281.4913243311.

Adding to 22304631 its reverse (13640322), we get a palindrome (35944953).

The spelling of 22304631 in words is "twenty-two million, three hundred four thousand, six hundred thirty-one".