111117631 has 2 divisors, whose sum is σ = 111117632. Its totient is φ = 111117630.

The previous prime is 111117583. The next prime is 111117641. The reversal of 111117631 is 136711111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111117631 - 2¹¹ = 111115583 is a prime.

It is a super-2 number, since 2×111117631² = 24694255838104322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111117641) 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 as a sum of consecutive naturals, namely, 55558815 + 55558816.

It is an arithmetic number, because the mean of its divisors is an integer number (55558816).

Almost surely, 2^111117631 is an apocalyptic number.

111117631 is a deficient number, since it is larger than the sum of its proper divisors (1).

111117631 is an equidigital number, since it uses as much as digits as its factorization.

111117631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126, while the sum is 22.

The square root of 111117631 is about 10541.2347948426. The cubic root of 111117631 is about 480.7592598922.

Adding to 111117631 its reverse (136711111), we get a palindrome (247828742).

The spelling of 111117631 in words is "one hundred eleven million, one hundred seventeen thousand, six hundred thirty-one".