16311013 has 2 divisors, whose sum is σ = 16311014. Its totient is φ = 16311012.

The previous prime is 16311011. The next prime is 16311049. The reversal of 16311013 is 31011361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16136289 + 174724 = 4017^2 + 418^2 .

It is an emirp because it is prime and its reverse (31011361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16311013 - 2¹ = 16311011 is a prime.

Together with 16311011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16311011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8155506 + 8155507.

It is an arithmetic number, because the mean of its divisors is an integer number (8155507).

Almost surely, 2^16311013 is an apocalyptic number.

It is an amenable number.

16311013 is a deficient number, since it is larger than the sum of its proper divisors (1).

16311013 is an equidigital number, since it uses as much as digits as its factorization.

16311013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 16311013 is about 4038.6895151769. The cubic root of 16311013 is about 253.6064596221.

Adding to 16311013 its reverse (31011361), we get a palindrome (47322374).

The spelling of 16311013 in words is "sixteen million, three hundred eleven thousand, thirteen".