111455681 has 4 divisors (see below), whose sum is σ = 111747072. Its totient is φ = 111164292.

The previous prime is 111455657. The next prime is 111455693. The reversal of 111455681 is 186554111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111455681 - 2¹⁰ = 111454657 is a prime.

It is a super-2 number, since 2×111455681² = 24844737654347522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111452681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145121 + ... + 145886.

It is an arithmetic number, because the mean of its divisors is an integer number (27936768).

Almost surely, 2^111455681 is an apocalyptic number.

It is an amenable number.

111455681 is a deficient number, since it is larger than the sum of its proper divisors (291391).

111455681 is an equidigital number, since it uses as much as digits as its factorization.

111455681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291390.

The product of its digits is 4800, while the sum is 32.

The square root of 111455681 is about 10557.2572669231. The cubic root of 111455681 is about 481.2462997186.

The spelling of 111455681 in words is "one hundred eleven million, four hundred fifty-five thousand, six hundred eighty-one".