11200431231 has 48 divisors (see below), whose sum is σ = 17784000000. Its totient is φ = 6736504320.

The previous prime is 11200431199. The next prime is 11200431241. The reversal of 11200431231 is 13213400211.

11200431231 is a `hidden beast` number, since 1 + 1 + 2 + 0 + 0 + 431 + 231 = 666.

It is not a de Polignac number, because 11200431231 - 2⁵ = 11200431199 is a prime.

It is a super-2 number, since 2×11200431231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11200431241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8966895 + ... + 8968143.

It is an arithmetic number, because the mean of its divisors is an integer number (370500000).

Almost surely, 2^11200431231 is an apocalyptic number.

11200431231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11200431231 is a deficient number, since it is larger than the sum of its proper divisors (6583568769).

11200431231 is a wasteful number, since it uses less digits than its factorization.

11200431231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884 (or 1881 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11200431231 its reverse (13213400211), we get a palindrome (24413831442).

The spelling of 11200431231 in words is "eleven billion, two hundred million, four hundred thirty-one thousand, two hundred thirty-one".