111550001 has 4 divisors (see below), whose sum is σ = 113654772. Its totient is φ = 109445232.

The previous prime is 111549959. The next prime is 111550027. The reversal of 111550001 is 100055111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60855601 + 50694400 = 7801^2 + 7120^2 .

It is a cyclic number.

It is not a de Polignac number, because 111550001 - 2¹⁸ = 111287857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111550051) 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, 1052306 + ... + 1052411.

It is an arithmetic number, because the mean of its divisors is an integer number (28413693).

Almost surely, 2^111550001 is an apocalyptic number.

It is an amenable number.

111550001 is a deficient number, since it is larger than the sum of its proper divisors (2104771).

111550001 is an equidigital number, since it uses as much as digits as its factorization.

111550001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104770.

The product of its (nonzero) digits is 25, while the sum is 14.

The square root of 111550001 is about 10561.7233915683. The cubic root of 111550001 is about 481.3820139098.

The spelling of 111550001 in words is "one hundred eleven million, five hundred fifty thousand, one".