22261265 has 8 divisors (see below), whose sum is σ = 28768488. Its totient is φ = 16439040.

The previous prime is 22261249. The next prime is 22261273. The reversal of 22261265 is 56216222.

It can be written as a sum of positive squares in 4 ways, for example, as 4963984 + 17297281 = 2228^2 + 4159^2 .

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

It is not a de Polignac number, because 22261265 - 2⁴ = 22261249 is a prime.

It is a Duffinian 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, 171176 + ... + 171305.

It is an arithmetic number, because the mean of its divisors is an integer number (3596061).

Almost surely, 2^22261265 is an apocalyptic number.

It is an amenable number.

22261265 is a deficient number, since it is larger than the sum of its proper divisors (6507223).

22261265 is a wasteful number, since it uses less digits than its factorization.

22261265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342499.

The product of its digits is 2880, while the sum is 26.

The square root of 22261265 is about 4718.1845025391. The cubic root of 22261265 is about 281.3087752061.

Adding to 22261265 its reverse (56216222), we get a palindrome (78477487).

The spelling of 22261265 in words is "twenty-two million, two hundred sixty-one thousand, two hundred sixty-five".