13151111 has 2 divisors, whose sum is σ = 13151112. Its totient is φ = 13151110.

The previous prime is 13151107. The next prime is 13151113. The reversal of 13151111 is 11115131.

13151111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (11115131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13151111 - 2² = 13151107 is a prime.

It is a Sophie Germain prime.

Together with 13151113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13151113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6575555 + 6575556.

It is an arithmetic number, because the mean of its divisors is an integer number (6575556).

Almost surely, 2^13151111 is an apocalyptic number.

13151111 is a deficient number, since it is larger than the sum of its proper divisors (1).

13151111 is an equidigital number, since it uses as much as digits as its factorization.

13151111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15, while the sum is 14.

The square root of 13151111 is about 3626.4460564029. The cubic root of 13151111 is about 236.0410191556.

Adding to 13151111 its reverse (11115131), we get a palindrome (24266242).

The spelling of 13151111 in words is "thirteen million, one hundred fifty-one thousand, one hundred eleven".