11311433231 has 8 divisors (see below), whose sum is σ = 13109428224. Its totient is φ = 9558957240.

The previous prime is 11311433201. The next prime is 11311433251. The reversal of 11311433231 is 13233411311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11311433231 - 2⁶ = 11311433167 is a prime.

It is a super-2 number, since 2×11311433231² (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 = 11311433197 and 11311433206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311433201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11379215 + ... + 11380208.

It is an arithmetic number, because the mean of its divisors is an integer number (1638678528).

Almost surely, 2^11311433231 is an apocalyptic number.

11311433231 is a deficient number, since it is larger than the sum of its proper divisors (1797994993).

11311433231 is an equidigital number, since it uses as much as digits as its factorization.

11311433231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22759501.

The product of its digits is 648, while the sum is 23.

Adding to 11311433231 its reverse (13233411311), we get a palindrome (24544844542).

The spelling of 11311433231 in words is "eleven billion, three hundred eleven million, four hundred thirty-three thousand, two hundred thirty-one".