22204631 has 4 divisors (see below), whose sum is σ = 22374264. Its totient is φ = 22035000.

The previous prime is 22204621. The next prime is 22204639. The reversal of 22204631 is 13640222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22204631 is a prime.

It is a super-2 number, since 2×22204631² = 986091275692322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22204639) 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, 84620 + ... + 84881.

It is an arithmetic number, because the mean of its divisors is an integer number (5593566).

Almost surely, 2^22204631 is an apocalyptic number.

22204631 is a deficient number, since it is larger than the sum of its proper divisors (169633).

22204631 is a wasteful number, since it uses less digits than its factorization.

22204631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169632.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 22204631 is about 4712.1790076354. The cubic root of 22204631 is about 281.0700171263.

Adding to 22204631 its reverse (13640222), we get a palindrome (35844853).

The spelling of 22204631 in words is "twenty-two million, two hundred four thousand, six hundred thirty-one".