11203440231 has 16 divisors (see below), whose sum is σ = 16407786240. Its totient is φ = 6768210240.

The previous prime is 11203440229. The next prime is 11203440247. The reversal of 11203440231 is 13204430211.

It is not a de Polignac number, because 11203440231 - 2¹ = 11203440229 is a prime.

It is a super-2 number, since 2×11203440231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11203440198 and 11203440207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11203440931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4271550 + ... + 4274171.

It is an arithmetic number, because the mean of its divisors is an integer number (1025486640).

Almost surely, 2^11203440231 is an apocalyptic number.

11203440231 is a deficient number, since it is larger than the sum of its proper divisors (5204346009).

11203440231 is a wasteful number, since it uses less digits than its factorization.

11203440231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8545766.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 11203440231 its reverse (13204430211), we get a palindrome (24407870442).

The spelling of 11203440231 in words is "eleven billion, two hundred three million, four hundred forty thousand, two hundred thirty-one".