11312031 has 4 divisors (see below), whose sum is σ = 15082712. Its totient is φ = 7541352.

The previous prime is 11312009. The next prime is 11312033. The reversal of 11312031 is 13021311.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11312031 - 2⁵ = 11311999 is a prime.

It is a super-2 number, since 2×11312031² = 255924090689922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11311998 and 11312016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312033) 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, 1885336 + ... + 1885341.

It is an arithmetic number, because the mean of its divisors is an integer number (3770678).

Almost surely, 2^11312031 is an apocalyptic number.

11312031 is a deficient number, since it is larger than the sum of its proper divisors (3770681).

11312031 is an equidigital number, since it uses as much as digits as its factorization.

11312031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770680.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 11312031 is about 3363.3362900549. The cubic root of 11312031 is about 224.4813138482.

Adding to 11312031 its reverse (13021311), we get a palindrome (24333342).

The spelling of 11312031 in words is "eleven million, three hundred twelve thousand, thirty-one".