22091031 has 12 divisors (see below), whose sum is σ = 32294808. Its totient is φ = 14549424.

The previous prime is 22091021. The next prime is 22091033. The reversal of 22091031 is 13019022.

It is a happy number.

It is not a de Polignac number, because 22091031 - 2¹⁵ = 22058263 is a prime.

It is a super-2 number, since 2×22091031² = 976027301285922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22090995 and 22091013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22091033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14040 + ... + 15533.

It is an arithmetic number, because the mean of its divisors is an integer number (2691234).

Almost surely, 2^22091031 is an apocalyptic number.

22091031 is a deficient number, since it is larger than the sum of its proper divisors (10203777).

22091031 is a wasteful number, since it uses less digits than its factorization.

22091031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29662 (or 29659 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 22091031 is about 4700.1096795713. The cubic root of 22091031 is about 280.5898746386.

It can be divided in two parts, 2209 and 1031, that added together give a triangular number (3240 = T₈₀).

The spelling of 22091031 in words is "twenty-two million, ninety-one thousand, thirty-one".