22100031 has 12 divisors (see below), whose sum is σ = 31963152. Its totient is φ = 14714496.

The previous prime is 22099999. The next prime is 22100041. The reversal of 22100031 is 13000122.

It is a happy number.

It is not a de Polignac number, because 22100031 - 2⁵ = 22099999 is a prime.

It is a super-2 number, since 2×22100031² = 976822740401922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 22099986 and 22100022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100041) 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 11 ways as a sum of consecutive naturals, for example, 12175 + ... + 13871.

It is an arithmetic number, because the mean of its divisors is an integer number (2663596).

Almost surely, 2^22100031 is an apocalyptic number.

22100031 is a deficient number, since it is larger than the sum of its proper divisors (9863121).

22100031 is a wasteful number, since it uses less digits than its factorization.

22100031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3150 (or 3147 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 22100031 is about 4701.0670065422. The cubic root of 22100031 is about 280.6279740526.

Adding to 22100031 its reverse (13000122), we get a palindrome (35100153).

Subtracting from 22100031 its reverse (13000122), we obtain a palindrome (9099909).

The spelling of 22100031 in words is "twenty-two million, one hundred thousand, thirty-one".