11315643 has 4 divisors (see below), whose sum is σ = 15087528. Its totient is φ = 7543760.

The previous prime is 11315641. The next prime is 11315663. The reversal of 11315643 is 34651311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34651311 = 3 ⋅11550437.

It is a cyclic number.

It is not a de Polignac number, because 11315643 - 2¹ = 11315641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11315641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1885938 + ... + 1885943.

It is an arithmetic number, because the mean of its divisors is an integer number (3771882).

Almost surely, 2^11315643 is an apocalyptic number.

11315643 is a deficient number, since it is larger than the sum of its proper divisors (3771885).

11315643 is an equidigital number, since it uses as much as digits as its factorization.

11315643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771884.

The product of its digits is 1080, while the sum is 24.

The square root of 11315643 is about 3363.8732140198. The cubic root of 11315643 is about 224.5052040533.

Adding to 11315643 its reverse (34651311), we get a palindrome (45966954).

The spelling of 11315643 in words is "eleven million, three hundred fifteen thousand, six hundred forty-three".