11431233031 has 4 divisors (see below), whose sum is σ = 11431590192. Its totient is φ = 11430875872.

The previous prime is 11431233029. The next prime is 11431233049. The reversal of 11431233031 is 13033213411.

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

It is a cyclic number.

It is not a de Polignac number, because 11431233031 - 2¹ = 11431233029 is a prime.

It is a super-2 number, since 2×11431233031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11431232993 and 11431233011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11431233071) 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, 125266 + ... + 196351.

It is an arithmetic number, because the mean of its divisors is an integer number (2857897548).

Almost surely, 2^11431233031 is an apocalyptic number.

11431233031 is a deficient number, since it is larger than the sum of its proper divisors (357161).

11431233031 is an equidigital number, since it uses as much as digits as its factorization.

11431233031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357160.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 11431233031 its reverse (13033213411), we get a palindrome (24464446442).

The spelling of 11431233031 in words is "eleven billion, four hundred thirty-one million, two hundred thirty-three thousand, thirty-one".