11303312031 has 24 divisors (see below), whose sum is σ = 17816408064. Its totient is φ = 6848519760.

The previous prime is 11303312023. The next prime is 11303312051. The reversal of 11303312031 is 13021330311.

It is a happy number.

11303312031 is a `hidden beast` number, since 1 + 130 + 331 + 203 + 1 = 666.

It is not a de Polignac number, because 11303312031 - 2³ = 11303312023 is a prime.

It is a super-2 number, since 2×11303312031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11303311995 and 11303312013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11303312051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 376290 + ... + 405216.

It is an arithmetic number, because the mean of its divisors is an integer number (742350336).

Almost surely, 2^11303312031 is an apocalyptic number.

11303312031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11303312031 is a deficient number, since it is larger than the sum of its proper divisors (6513096033).

11303312031 is a wasteful number, since it uses less digits than its factorization.

11303312031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32891 (or 32888 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 11303312031 its reverse (13021330311), we get a palindrome (24324642342).

The spelling of 11303312031 in words is "eleven billion, three hundred three million, three hundred twelve thousand, thirty-one".