111513432031 has 2 divisors, whose sum is σ = 111513432032. Its totient is φ = 111513432030.

The previous prime is 111513432013. The next prime is 111513432071. The reversal of 111513432031 is 130234315111.

Together with previous prime (111513432013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111513432031 - 2⁷ = 111513431903 is a prime.

It is a super-2 number, since 2×111513432031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111513431987 and 111513432005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111513432071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55756716015 + 55756716016.

It is an arithmetic number, because the mean of its divisors is an integer number (55756716016).

Almost surely, 2^111513432031 is an apocalyptic number.

111513432031 is a deficient number, since it is larger than the sum of its proper divisors (1).

111513432031 is an equidigital number, since it uses as much as digits as its factorization.

111513432031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 111513432031 its reverse (130234315111), we get a palindrome (241747747142).

The spelling of 111513432031 in words is "one hundred eleven billion, five hundred thirteen million, four hundred thirty-two thousand, thirty-one".