113443645431 has 4 divisors (see below), whose sum is σ = 151258193912. Its totient is φ = 75629096952.

The previous prime is 113443645333. The next prime is 113443645451. The reversal of 113443645431 is 134546344311.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 113443645431 - 2¹⁰ = 113443644407 is a prime.

It is a super-2 number, since 2×113443645431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 113443645431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113443645451) 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, 18907274236 + ... + 18907274241.

It is an arithmetic number, because the mean of its divisors is an integer number (37814548478).

Almost surely, 2^113443645431 is an apocalyptic number.

113443645431 is a deficient number, since it is larger than the sum of its proper divisors (37814548481).

113443645431 is an equidigital number, since it uses as much as digits as its factorization.

113443645431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37814548480.

The product of its digits is 207360, while the sum is 39.

Adding to 113443645431 its reverse (134546344311), we get a palindrome (247989989742).

The spelling of 113443645431 in words is "one hundred thirteen billion, four hundred forty-three million, six hundred forty-five thousand, four hundred thirty-one".