22117631 has 4 divisors (see below), whose sum is σ = 22179600. Its totient is φ = 22055664.

The previous prime is 22117621. The next prime is 22117639. The reversal of 22117631 is 13671122.

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 22117631 - 2⁶ = 22117567 is a prime.

It is a super-2 number, since 2×22117631² = 978379202104322, 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 = 22117597 and 22117606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22117639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30446 + ... + 31163.

It is an arithmetic number, because the mean of its divisors is an integer number (5544900).

Almost surely, 2^22117631 is an apocalyptic number.

22117631 is a deficient number, since it is larger than the sum of its proper divisors (61969).

22117631 is an equidigital number, since it uses as much as digits as its factorization.

22117631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61968.

The product of its digits is 504, while the sum is 23.

The square root of 22117631 is about 4702.9385494603. The cubic root of 22117631 is about 280.7024496918.

Adding to 22117631 its reverse (13671122), we get a palindrome (35788753).

The spelling of 22117631 in words is "twenty-two million, one hundred seventeen thousand, six hundred thirty-one".