16831081 has 2 divisors, whose sum is σ = 16831082. Its totient is φ = 16831080.

The previous prime is 16831079. The next prime is 16831117. The reversal of 16831081 is 18013861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15531481 + 1299600 = 3941^2 + 1140^2 .

It is a cyclic number.

It is not a de Polignac number, because 16831081 - 2¹ = 16831079 is a prime.

It is a super-2 number, since 2×16831081² = 566570575257122, which contains 22 as substring.

Together with 16831079, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16831021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8415540 + 8415541.

It is an arithmetic number, because the mean of its divisors is an integer number (8415541).

Almost surely, 2^16831081 is an apocalyptic number.

It is an amenable number.

16831081 is a deficient number, since it is larger than the sum of its proper divisors (1).

16831081 is an equidigital number, since it uses as much as digits as its factorization.

16831081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 16831081 is about 4102.5700481527. The cubic root of 16831081 is about 256.2736788747.

The spelling of 16831081 in words is "sixteen million, eight hundred thirty-one thousand, eighty-one".