11511513315 has 64 divisors (see below), whose sum is σ = 21389558400. Its totient is φ = 5866463232.

The previous prime is 11511513311. The next prime is 11511513329. The reversal of 11511513315 is 51331511511.

11511513315 is a `hidden beast` number, since 1 + 1 + 511 + 5 + 133 + 15 = 666.

It is not a de Polignac number, because 11511513315 - 2² = 11511513311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (11511513311) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 364599 + ... + 394911.

It is an arithmetic number, because the mean of its divisors is an integer number (334211850).

Almost surely, 2^11511513315 is an apocalyptic number.

11511513315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11511513315 is a deficient number, since it is larger than the sum of its proper divisors (9878045085).

11511513315 is a wasteful number, since it uses less digits than its factorization.

11511513315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30453 (or 30447 counting only the distinct ones).

The product of its digits is 1125, while the sum is 27.

The spelling of 11511513315 in words is "eleven billion, five hundred eleven million, five hundred thirteen thousand, three hundred fifteen".