11515812 has 96 divisors (see below), whose sum is σ = 34105344. Its totient is φ = 2962080.

The previous prime is 11515811. The next prime is 11515831. The reversal of 11515812 is 21851511.

It is a super-2 number, since 2×11515812² = 265227852038688, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (11515811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111753 + ... + 111855.

It is an arithmetic number, because the mean of its divisors is an integer number (355264).

Almost surely, 2^11515812 is an apocalyptic number.

11515812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11515812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17052672).

11515812 is an abundant number, since it is smaller than the sum of its proper divisors (22589532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11515812 is a wasteful number, since it uses less digits than its factorization.

11515812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 126 counting only the distinct ones).

The product of its digits is 400, while the sum is 24.

The square root of 11515812 is about 3393.4955429468. The cubic root of 11515812 is about 225.8212751497.

The spelling of 11515812 in words is "eleven million, five hundred fifteen thousand, eight hundred twelve".