11311312 has 20 divisors (see below), whose sum is σ = 21967840. Its totient is φ = 5642208.

The previous prime is 11311301. The next prime is 11311319. The reversal of 11311312 is 21311311.

It is a super-2 number, since 2×11311312² = 255891558322688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11311292 and 11311301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311319) 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, 12739 + ... + 13597.

It is an arithmetic number, because the mean of its divisors is an integer number (1098392).

Almost surely, 2^11311312 is an apocalyptic number.

It is an amenable number.

11311312 is a deficient number, since it is larger than the sum of its proper divisors (10656528).

11311312 is an equidigital number, since it uses as much as digits as its factorization.

11311312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690 (or 1684 counting only the distinct ones).

The product of its digits is 18, while the sum is 13.

The square root of 11311312 is about 3363.2294004424. The cubic root of 11311312 is about 224.4765576883.

Adding to 11311312 its reverse (21311311), we get a palindrome (32622623).

Subtracting 11311312 from its reverse (21311311), we obtain a palindrome (9999999).

The spelling of 11311312 in words is "eleven million, three hundred eleven thousand, three hundred twelve".