111906553 has 16 divisors (see below), whose sum is σ = 124433280. Its totient is φ = 99792000.

The previous prime is 111906551. The next prime is 111906583. The reversal of 111906553 is 355609111.

It is not a de Polignac number, because 111906553 - 2¹ = 111906551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111906551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147451 + ... + 148207.

It is an arithmetic number, because the mean of its divisors is an integer number (7777080).

Almost surely, 2^111906553 is an apocalyptic number.

It is an amenable number.

111906553 is a deficient number, since it is larger than the sum of its proper divisors (12526727).

111906553 is a wasteful number, since it uses less digits than its factorization.

111906553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 111906553 is about 10578.5893672077. The cubic root of 111906553 is about 481.8943556739.

The spelling of 111906553 in words is "one hundred eleven million, nine hundred six thousand, five hundred fifty-three".