21532283 has 2 divisors, whose sum is σ = 21532284. Its totient is φ = 21532282.

The previous prime is 21532271. The next prime is 21532289. The reversal of 21532283 is 38223512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21532283 - 2⁶ = 21532219 is a prime.

It is a super-2 number, since 2×21532283² = 927278422384178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21532289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10766141 + 10766142.

It is an arithmetic number, because the mean of its divisors is an integer number (10766142).

Almost surely, 2^21532283 is an apocalyptic number.

21532283 is a deficient number, since it is larger than the sum of its proper divisors (1).

21532283 is an equidigital number, since it uses as much as digits as its factorization.

21532283 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 26.

The square root of 21532283 is about 4640.2891073725. The cubic root of 21532283 is about 278.2039934355.

Adding to 21532283 its reverse (38223512), we get a palindrome (59755795).

The spelling of 21532283 in words is "twenty-one million, five hundred thirty-two thousand, two hundred eighty-three".