22118031 has 12 divisors (see below), whose sum is σ = 34406008. Its totient is φ = 13611024.

The previous prime is 22118029. The next prime is 22118053. The reversal of 22118031 is 13081122.

It is not a de Polignac number, because 22118031 - 2¹ = 22118029 is a prime.

It is a super-2 number, since 2×22118031² = 978414590633922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22117995 and 22118013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22118011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94405 + ... + 94638.

Almost surely, 2^22118031 is an apocalyptic number.

22118031 is a deficient number, since it is larger than the sum of its proper divisors (12287977).

22118031 is a wasteful number, since it uses less digits than its factorization.

22118031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189062 (or 189059 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 22118031 is about 4702.9810758709. The cubic root of 22118031 is about 280.7041418607.

Adding to 22118031 its reverse (13081122), we get a palindrome (35199153).

The spelling of 22118031 in words is "twenty-two million, one hundred eighteen thousand, thirty-one".