13515112511 has 2 divisors, whose sum is σ = 13515112512. Its totient is φ = 13515112510.

The previous prime is 13515112451. The next prime is 13515112537. The reversal of 13515112511 is 11521151531.

It is a happy number.

It is an a-pointer prime, because the next prime (13515112537) can be obtained adding 13515112511 to its sum of digits (26).

It is a strong prime.

It is an emirp because it is prime and its reverse (11521151531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13515112511 - 2²² = 13510918207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13515112571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6757556255 + 6757556256.

It is an arithmetic number, because the mean of its divisors is an integer number (6757556256).

Almost surely, 2^13515112511 is an apocalyptic number.

13515112511 is a deficient number, since it is larger than the sum of its proper divisors (1).

13515112511 is an equidigital number, since it uses as much as digits as its factorization.

13515112511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 750, while the sum is 26.

The spelling of 13515112511 in words is "thirteen billion, five hundred fifteen million, one hundred twelve thousand, five hundred eleven".