21883249 has 2 divisors, whose sum is σ = 21883250. Its totient is φ = 21883248.

The previous prime is 21883207. The next prime is 21883261. The reversal of 21883249 is 94238812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21790224 + 93025 = 4668^2 + 305^2 .

It is a cyclic number.

It is not a de Polignac number, because 21883249 - 2¹¹ = 21881201 is a prime.

It is not a weakly prime, because it can be changed into another prime (21883049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10941624 + 10941625.

It is an arithmetic number, because the mean of its divisors is an integer number (10941625).

Almost surely, 2^21883249 is an apocalyptic number.

It is an amenable number.

21883249 is a deficient number, since it is larger than the sum of its proper divisors (1).

21883249 is an equidigital number, since it uses as much as digits as its factorization.

21883249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 37.

The square root of 21883249 is about 4677.9535055406. The cubic root of 21883249 is about 279.7073856360.

The spelling of 21883249 in words is "twenty-one million, eight hundred eighty-three thousand, two hundred forty-nine".