109855545 has 32 divisors (see below), whose sum is σ = 179487360. Its totient is φ = 57361920.

The previous prime is 109855517. The next prime is 109855561. The reversal of 109855545 is 545558901.

It is a happy number.

It is not a de Polignac number, because 109855545 - 2¹⁷ = 109724473 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 109855497 and 109855506.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 282211 + ... + 282599.

It is an arithmetic number, because the mean of its divisors is an integer number (5608980).

Almost surely, 2^109855545 is an apocalyptic number.

109855545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

109855545 is a deficient number, since it is larger than the sum of its proper divisors (69631815).

109855545 is a wasteful number, since it uses less digits than its factorization.

109855545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745.

The product of its (nonzero) digits is 180000, while the sum is 42.

The square root of 109855545 is about 10481.1995973743. The cubic root of 109855545 is about 478.9321530524.

The spelling of 109855545 in words is "one hundred nine million, eight hundred fifty-five thousand, five hundred forty-five".