21652283 has 2 divisors, whose sum is σ = 21652284. Its totient is φ = 21652282.

The previous prime is 21652273. The next prime is 21652327. The reversal of 21652283 is 38225612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21652283 - 2⁶ = 21652219 is a prime.

It is a super-2 number, since 2×21652283² = 937642718224178, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21652273) 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, 10826141 + 10826142.

It is an arithmetic number, because the mean of its divisors is an integer number (10826142).

Almost surely, 2^21652283 is an apocalyptic number.

21652283 is a deficient number, since it is larger than the sum of its proper divisors (1).

21652283 is an equidigital number, since it uses as much as digits as its factorization.

21652283 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 29.

The square root of 21652283 is about 4653.2013710993. The cubic root of 21652283 is about 278.7198491389.

Adding to 21652283 its reverse (38225612), we get a palindrome (59877895).

It can be divided in two parts, 216 and 52283, that multiplied together give a triangular number (11293128 = T₄₇₅₂).

The spelling of 21652283 in words is "twenty-one million, six hundred fifty-two thousand, two hundred eighty-three".