22051265 has 4 divisors (see below), whose sum is σ = 26461524. Its totient is φ = 17641008.

The previous prime is 22051247. The next prime is 22051277. The reversal of 22051265 is 56215022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16834609 + 5216656 = 4103^2 + 2284^2 .

It is a cyclic number.

It is not a de Polignac number, because 22051265 - 2⁸ = 22051009 is a prime.

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 22051265.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2205122 + ... + 2205131.

It is an arithmetic number, because the mean of its divisors is an integer number (6615381).

Almost surely, 2^22051265 is an apocalyptic number.

It is an amenable number.

22051265 is a deficient number, since it is larger than the sum of its proper divisors (4410259).

22051265 is an equidigital number, since it uses as much as digits as its factorization.

22051265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4410258.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 22051265 is about 4695.8774472935. The cubic root of 22051265 is about 280.4214105112.

Adding to 22051265 its reverse (56215022), we get a palindrome (78266287).

The spelling of 22051265 in words is "twenty-two million, fifty-one thousand, two hundred sixty-five".