16283821 has 2 divisors, whose sum is σ = 16283822. Its totient is φ = 16283820.

The previous prime is 16283803. The next prime is 16283843. The reversal of 16283821 is 12838261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11492100 + 4791721 = 3390^2 + 2189^2 .

It is an emirp because it is prime and its reverse (12838261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16283821 - 2⁵ = 16283789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16283801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8141910 + 8141911.

It is an arithmetic number, because the mean of its divisors is an integer number (8141911).

Almost surely, 2^16283821 is an apocalyptic number.

It is an amenable number.

16283821 is a deficient number, since it is larger than the sum of its proper divisors (1).

16283821 is an equidigital number, since it uses as much as digits as its factorization.

16283821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 31.

The square root of 16283821 is about 4035.3216724321. The cubic root of 16283821 is about 253.4654525914.

The spelling of 16283821 in words is "sixteen million, two hundred eighty-three thousand, eight hundred twenty-one".