11143202431 has 4 divisors (see below), whose sum is σ = 11143440000. Its totient is φ = 11142964864.

The previous prime is 11143202429. The next prime is 11143202461. The reversal of 11143202431 is 13420234111.

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 11143202431 - 2¹ = 11143202429 is a prime.

It is a super-2 number, since 2×11143202431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11143202461) 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, 22306 + ... + 150943.

It is an arithmetic number, because the mean of its divisors is an integer number (2785860000).

Almost surely, 2^11143202431 is an apocalyptic number.

11143202431 is a deficient number, since it is larger than the sum of its proper divisors (237569).

11143202431 is an equidigital number, since it uses as much as digits as its factorization.

11143202431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237568.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 11143202431 its reverse (13420234111), we get a palindrome (24563436542).

The spelling of 11143202431 in words is "eleven billion, one hundred forty-three million, two hundred two thousand, four hundred thirty-one".