21883271 has 2 divisors, whose sum is σ = 21883272. Its totient is φ = 21883270.

The previous prime is 21883261. The next prime is 21883273. The reversal of 21883271 is 17238812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21883271 - 2⁶ = 21883207 is a prime.

Together with 21883273, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21883273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10941635 + 10941636.

It is an arithmetic number, because the mean of its divisors is an integer number (10941636).

Almost surely, 2^21883271 is an apocalyptic number.

21883271 is a deficient number, since it is larger than the sum of its proper divisors (1).

21883271 is an equidigital number, since it uses as much as digits as its factorization.

21883271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 32.

The square root of 21883271 is about 4677.9558569957. The cubic root of 21883271 is about 279.7074793692.

The spelling of 21883271 in words is "twenty-one million, eight hundred eighty-three thousand, two hundred seventy-one".