16838281 has 2 divisors, whose sum is σ = 16838282. Its totient is φ = 16838280.

The previous prime is 16838273. The next prime is 16838309. The reversal of 16838281 is 18283861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12390400 + 4447881 = 3520^2 + 2109^2 .

It is an emirp because it is prime and its reverse (18283861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16838281 - 2³ = 16838273 is a prime.

It is a super-2 number, since 2×16838281² = 567055414069922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16838281.

It is not a weakly prime, because it can be changed into another prime (16838221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8419140 + 8419141.

It is an arithmetic number, because the mean of its divisors is an integer number (8419141).

Almost surely, 2^16838281 is an apocalyptic number.

It is an amenable number.

16838281 is a deficient number, since it is larger than the sum of its proper divisors (1).

16838281 is an equidigital number, since it uses as much as digits as its factorization.

16838281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 37.

The square root of 16838281 is about 4103.4474530570. The cubic root of 16838281 is about 256.3102165842.

The spelling of 16838281 in words is "sixteen million, eight hundred thirty-eight thousand, two hundred eighty-one".