23431111555 has 8 divisors (see below), whose sum is σ = 28272679344. Its totient is φ = 18641325600.

The previous prime is 23431111477. The next prime is 23431111559. The reversal of 23431111555 is 55511113432.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23431111555 - 2¹³ = 23431103363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23431111559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12944461 + ... + 12946270.

It is an arithmetic number, because the mean of its divisors is an integer number (3534084918).

Almost surely, 2^23431111555 is an apocalyptic number.

23431111555 is a deficient number, since it is larger than the sum of its proper divisors (4841567789).

23431111555 is a wasteful number, since it uses less digits than its factorization.

23431111555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25890917.

The product of its digits is 9000, while the sum is 31.

Adding to 23431111555 its reverse (55511113432), we get a palindrome (78942224987).

The spelling of 23431111555 in words is "twenty-three billion, four hundred thirty-one million, one hundred eleven thousand, five hundred fifty-five".