22330781 has 12 divisors (see below), whose sum is σ = 24917280. Its totient is φ = 19847160.

The previous prime is 22330771. The next prime is 22330807. The reversal of 22330781 is 18703322.

It is not a de Polignac number, because 22330781 - 2¹⁸ = 22068637 is a prime.

It is a super-2 number, since 2×22330781² = 997327560139922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22330781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22330751) 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, 23840 + ... + 24758.

It is an arithmetic number, because the mean of its divisors is an integer number (2076440).

Almost surely, 2^22330781 is an apocalyptic number.

It is an amenable number.

22330781 is a deficient number, since it is larger than the sum of its proper divisors (2586499).

22330781 is an equidigital number, since it uses as much as digits as its factorization.

22330781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024 (or 977 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 22330781 is about 4725.5455769678. The cubic root of 22330781 is about 281.6012883908.

The spelling of 22330781 in words is "twenty-two million, three hundred thirty thousand, seven hundred eighty-one".