16113281 has 2 divisors, whose sum is σ = 16113282. Its totient is φ = 16113280.

The previous prime is 16113269. The next prime is 16113283. The reversal of 16113281 is 18231161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14938225 + 1175056 = 3865^2 + 1084^2 .

It is a cyclic number.

It is not a de Polignac number, because 16113281 - 2¹⁴ = 16096897 is a prime.

It is a super-2 number, since 2×16113281² = 519275649169922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 16113283, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16113283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8056640 + 8056641.

It is an arithmetic number, because the mean of its divisors is an integer number (8056641).

Almost surely, 2^16113281 is an apocalyptic number.

It is an amenable number.

16113281 is a deficient number, since it is larger than the sum of its proper divisors (1).

16113281 is an equidigital number, since it uses as much as digits as its factorization.

16113281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 23.

The square root of 16113281 is about 4014.1351496929. The cubic root of 16113281 is about 252.5774999826.

The spelling of 16113281 in words is "sixteen million, one hundred thirteen thousand, two hundred eighty-one".