11515279 has 2 divisors, whose sum is σ = 11515280. Its totient is φ = 11515278.

The previous prime is 11515253. The next prime is 11515289. The reversal of 11515279 is 97251511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11515279 - 2¹³ = 11507087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11515279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11515289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757639 + 5757640.

It is an arithmetic number, because the mean of its divisors is an integer number (5757640).

Almost surely, 2^11515279 is an apocalyptic number.

11515279 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515279 is an equidigital number, since it uses as much as digits as its factorization.

11515279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 31.

The square root of 11515279 is about 3393.4170094464. The cubic root of 11515279 is about 225.8177911113.

The spelling of 11515279 in words is "eleven million, five hundred fifteen thousand, two hundred seventy-nine".