11151215513 has 2 divisors, whose sum is σ = 11151215514. Its totient is φ = 11151215512.

The previous prime is 11151215503. The next prime is 11151215531. The reversal of 11151215513 is 31551215111.

It is a happy number.

Together with next prime (11151215531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11149670464 + 1545049 = 105592^2 + 1243^2 .

It is a cyclic number.

It is not a de Polignac number, because 11151215513 - 2⁴ = 11151215497 is a prime.

It is not a weakly prime, because it can be changed into another prime (11151215503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5575607756 + 5575607757.

It is an arithmetic number, because the mean of its divisors is an integer number (5575607757).

Almost surely, 2^11151215513 is an apocalyptic number.

It is an amenable number.

11151215513 is a deficient number, since it is larger than the sum of its proper divisors (1).

11151215513 is an equidigital number, since it uses as much as digits as its factorization.

11151215513 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 11151215513 in words is "eleven billion, one hundred fifty-one million, two hundred fifteen thousand, five hundred thirteen".