22182381 has 12 divisors (see below), whose sum is σ = 34506108. Its totient is φ = 13650624.

The previous prime is 22182379. The next prime is 22182383. The reversal of 22182381 is 18328122.

It is an interprime number because it is at equal distance from previous prime (22182379) and next prime (22182383).

It can be written as a sum of positive squares in 2 ways, for example, as 1334025 + 20848356 = 1155^2 + 4566^2 .

It is not a de Polignac number, because 22182381 - 2¹ = 22182379 is a prime.

It is a super-2 number, since 2×22182381² = 984116053658322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22182383) 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, 94680 + ... + 94913.

It is an arithmetic number, because the mean of its divisors is an integer number (2875509).

Almost surely, 2^22182381 is an apocalyptic number.

It is an amenable number.

22182381 is a deficient number, since it is larger than the sum of its proper divisors (12323727).

22182381 is a wasteful number, since it uses less digits than its factorization.

22182381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189612 (or 189609 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 22182381 is about 4709.8175123884. The cubic root of 22182381 is about 280.9761043159.

The spelling of 22182381 in words is "twenty-two million, one hundred eighty-two thousand, three hundred eighty-one".