22271805 has 48 divisors (see below), whose sum is σ = 40098240. Its totient is φ = 11430144.

The previous prime is 22271803. The next prime is 22271903. The reversal of 22271805 is 50817222.

It is not a de Polignac number, because 22271805 - 2¹ = 22271803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22271803) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 250201 + ... + 250289.

It is an arithmetic number, because the mean of its divisors is an integer number (835380).

Almost surely, 2^22271805 is an apocalyptic number.

It is an amenable number.

22271805 is a deficient number, since it is larger than the sum of its proper divisors (17826435).

22271805 is a wasteful number, since it uses less digits than its factorization.

22271805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 22271805 is about 4719.3013254082. The cubic root of 22271805 is about 281.3531651164.

It can be divided in two parts, 222 and 71805, that added together give a palindrome (72027).

The spelling of 22271805 in words is "twenty-two million, two hundred seventy-one thousand, eight hundred five".