22180765 has 8 divisors (see below), whose sum is σ = 27119448. Its totient is φ = 17409600.

The previous prime is 22180747. The next prime is 22180777. The reversal of 22180765 is 56708122.

It can be written as a sum of positive squares in 4 ways, for example, as 109561 + 22071204 = 331^2 + 4698^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22180765 - 2¹⁵ = 22147997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41586 + ... + 42115.

It is an arithmetic number, because the mean of its divisors is an integer number (3389931).

Almost surely, 2^22180765 is an apocalyptic number.

It is an amenable number.

22180765 is a deficient number, since it is larger than the sum of its proper divisors (4938683).

22180765 is an equidigital number, since it uses as much as digits as its factorization.

22180765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83759.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 22180765 is about 4709.6459527230. The cubic root of 22180765 is about 280.9692810566.

Adding to 22180765 its reverse (56708122), we get a palindrome (78888887).

The spelling of 22180765 in words is "twenty-two million, one hundred eighty thousand, seven hundred sixty-five".