22261271 has 4 divisors (see below), whose sum is σ = 22306032. Its totient is φ = 22216512.

The previous prime is 22261249. The next prime is 22261273. The reversal of 22261271 is 17216222.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 22261271 - 2⁶ = 22261207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22261273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21626 + ... + 22631.

It is an arithmetic number, because the mean of its divisors is an integer number (5576508).

Almost surely, 2^22261271 is an apocalyptic number.

22261271 is a deficient number, since it is larger than the sum of its proper divisors (44761).

22261271 is an equidigital number, since it uses as much as digits as its factorization.

22261271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44760.

The product of its digits is 672, while the sum is 23.

The square root of 22261271 is about 4718.1851383768. The cubic root of 22261271 is about 281.3088004795.

Adding to 22261271 its reverse (17216222), we get a palindrome (39477493).

The spelling of 22261271 in words is "twenty-two million, two hundred sixty-one thousand, two hundred seventy-one".