21483191 has 2 divisors, whose sum is σ = 21483192. Its totient is φ = 21483190.

The previous prime is 21483169. The next prime is 21483197. The reversal of 21483191 is 19138412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21483191 - 2¹⁴ = 21466807 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21483197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10741595 + 10741596.

It is an arithmetic number, because the mean of its divisors is an integer number (10741596).

Almost surely, 2^21483191 is an apocalyptic number.

21483191 is a deficient number, since it is larger than the sum of its proper divisors (1).

21483191 is an equidigital number, since it uses as much as digits as its factorization.

21483191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 29.

The square root of 21483191 is about 4634.9963322531. The cubic root of 21483191 is about 277.9924044299.

The spelling of 21483191 in words is "twenty-one million, four hundred eighty-three thousand, one hundred ninety-one".