22139811 has 20 divisors (see below), whose sum is σ = 33201432. Its totient is φ = 14702688.

The previous prime is 22139749. The next prime is 22139837. The reversal of 22139811 is 11893122.

It is not a de Polignac number, because 22139811 - 2¹¹ = 22137763 is a prime.

It is a super-2 number, since 2×22139811² = 980342462231442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22139861) 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 19 ways as a sum of consecutive naturals, for example, 35575 + ... + 36191.

Almost surely, 2^22139811 is an apocalyptic number.

22139811 is a deficient number, since it is larger than the sum of its proper divisors (11061621).

22139811 is an equidigital number, since it uses as much as digits as its factorization.

22139811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072 (or 1063 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 22139811 is about 4705.2960586981. The cubic root of 22139811 is about 280.7962496760.

The spelling of 22139811 in words is "twenty-two million, one hundred thirty-nine thousand, eight hundred eleven".