111415231 has 2 divisors, whose sum is σ = 111415232. Its totient is φ = 111415230.

The previous prime is 111415211. The next prime is 111415237. The reversal of 111415231 is 132514111.

It is a strong prime.

It is an emirp because it is prime and its reverse (132514111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111415231 is a prime.

It is a super-2 number, since 2×111415231² = 24826707397566722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111415199 and 111415208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111415237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55707615 + 55707616.

It is an arithmetic number, because the mean of its divisors is an integer number (55707616).

Almost surely, 2^111415231 is an apocalyptic number.

111415231 is a deficient number, since it is larger than the sum of its proper divisors (1).

111415231 is an equidigital number, since it uses as much as digits as its factorization.

111415231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120, while the sum is 19.

The square root of 111415231 is about 10555.3413492885. The cubic root of 111415231 is about 481.1880739793.

Adding to 111415231 its reverse (132514111), we get a palindrome (243929342).

The spelling of 111415231 in words is "one hundred eleven million, four hundred fifteen thousand, two hundred thirty-one".