111115005431 has 2 divisors, whose sum is σ = 111115005432. Its totient is φ = 111115005430.

The previous prime is 111115005427. The next prime is 111115005451. The reversal of 111115005431 is 134500511111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111115005431 - 2² = 111115005427 is a prime.

It is a super-2 number, since 2×111115005431² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111115005397 and 111115005406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111115005451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55557502715 + 55557502716.

It is an arithmetic number, because the mean of its divisors is an integer number (55557502716).

Almost surely, 2^111115005431 is an apocalyptic number.

111115005431 is a deficient number, since it is larger than the sum of its proper divisors (1).

111115005431 is an equidigital number, since it uses as much as digits as its factorization.

111115005431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 23.

Adding to 111115005431 its reverse (134500511111), we get a palindrome (245615516542).

The spelling of 111115005431 in words is "one hundred eleven billion, one hundred fifteen million, five thousand, four hundred thirty-one".