11203144431 has 4 divisors (see below), whose sum is σ = 14937525912. Its totient is φ = 7468762952.

The previous prime is 11203144411. The next prime is 11203144441. The reversal of 11203144431 is 13444130211.

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 11203144431 - 2¹⁵ = 11203111663 is a prime.

It is a super-2 number, since 2×11203144431² (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 (11203144411) 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, 1867190736 + ... + 1867190741.

It is an arithmetic number, because the mean of its divisors is an integer number (3734381478).

Almost surely, 2^11203144431 is an apocalyptic number.

11203144431 is a deficient number, since it is larger than the sum of its proper divisors (3734381481).

11203144431 is an equidigital number, since it uses as much as digits as its factorization.

11203144431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3734381480.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 11203144431 its reverse (13444130211), we get a palindrome (24647274642).

The spelling of 11203144431 in words is "eleven billion, two hundred three million, one hundred forty-four thousand, four hundred thirty-one".