111545144431 has 6 divisors (see below), whose sum is σ = 129756596640. Its totient is φ = 95610123756.

The previous prime is 111545144413. The next prime is 111545144437. The reversal of 111545144431 is 134441545111.

It is not a de Polignac number, because 111545144431 - 2¹¹ = 111545142383 is a prime.

It is a super-2 number, since 2×111545144431² (a number of 23 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 (111545144437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1138215711 + ... + 1138215808.

It is an arithmetic number, because the mean of its divisors is an integer number (21626099440).

Almost surely, 2^111545144431 is an apocalyptic number.

111545144431 is a deficient number, since it is larger than the sum of its proper divisors (18211452209).

111545144431 is an equidigital number, since it uses as much as digits as its factorization.

111545144431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276431533 (or 2276431526 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

Adding to 111545144431 its reverse (134441545111), we get a palindrome (245986689542).

The spelling of 111545144431 in words is "one hundred eleven billion, five hundred forty-five million, one hundred forty-four thousand, four hundred thirty-one".