111555061 has 4 divisors (see below), whose sum is σ = 117426400. Its totient is φ = 105683724.

The previous prime is 111555053. The next prime is 111555079. The reversal of 111555061 is 160555111.

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 111555061 - 2³ = 111555053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111555001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2935641 + ... + 2935678.

It is an arithmetic number, because the mean of its divisors is an integer number (29356600).

Almost surely, 2^111555061 is an apocalyptic number.

It is an amenable number.

111555061 is a deficient number, since it is larger than the sum of its proper divisors (5871339).

111555061 is an equidigital number, since it uses as much as digits as its factorization.

111555061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5871338.

The product of its (nonzero) digits is 750, while the sum is 25.

The square root of 111555061 is about 10561.9629330916. The cubic root of 111555061 is about 481.3892924281.

Subtracting 111555061 from its reverse (160555111), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 111555061 in words is "one hundred eleven million, five hundred fifty-five thousand, sixty-one".