11162813 has 4 divisors (see below), whose sum is σ = 11224668. Its totient is φ = 11100960.

The previous prime is 11162791. The next prime is 11162819. The reversal of 11162813 is 31826111.

11162813 = 2362² + 2363².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31826111 = 113 ⋅281647.

It can be written as a sum of positive squares in 2 ways, for example, as 5583769 + 5579044 = 2363^2 + 2362^2 .

It is a cyclic number.

It is not a de Polignac number, because 11162813 - 2¹⁰ = 11161789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11162819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30656 + ... + 31017.

It is an arithmetic number, because the mean of its divisors is an integer number (2806167).

Almost surely, 2^11162813 is an apocalyptic number.

11162813 is the 2363-rd centered square number.

It is an amenable number.

11162813 is a deficient number, since it is larger than the sum of its proper divisors (61855).

11162813 is an equidigital number, since it uses as much as digits as its factorization.

11162813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61854.

The product of its digits is 288, while the sum is 23.

The square root of 11162813 is about 3341.0796159326. The cubic root of 11162813 is about 223.4898907222.

Adding to 11162813 its reverse (31826111), we get a palindrome (42988924).

The spelling of 11162813 in words is "eleven million, one hundred sixty-two thousand, eight hundred thirteen".