21652227 has 12 divisors (see below), whose sum is σ = 31335304. Its totient is φ = 14407200.

The previous prime is 21652219. The next prime is 21652273. The reversal of 21652227 is 72225612.

21652227 is a `hidden beast` number, since 2 + 1 + 652 + 2 + 2 + 7 = 666.

It is not a de Polignac number, because 21652227 - 2³ = 21652219 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 21652227.

It is not an unprimeable number, because it can be changed into a prime (21652217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3408 + ... + 7410.

Almost surely, 2^21652227 is an apocalyptic number.

21652227 is a deficient number, since it is larger than the sum of its proper divisors (9683077).

21652227 is a wasteful number, since it uses less digits than its factorization.

21652227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4610 (or 4607 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 21652227 is about 4653.1953537327. The cubic root of 21652227 is about 278.7196088513.

Adding to 21652227 its reverse (72225612), we get a palindrome (93877839).

The spelling of 21652227 in words is "twenty-one million, six hundred fifty-two thousand, two hundred twenty-seven".