108851681 has 4 divisors (see below), whose sum is σ = 108908292. Its totient is φ = 108795072.

The previous prime is 108851653. The next prime is 108851683. The reversal of 108851681 is 186158801.

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 73805281 + 35046400 = 8591^2 + 5920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108851681 is a prime.

It is a super-2 number, since 2×108851681² = 23697376913051522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (108851683) 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, 25316 + ... + 29301.

It is an arithmetic number, because the mean of its divisors is an integer number (27227073).

Almost surely, 2^108851681 is an apocalyptic number.

It is an amenable number.

108851681 is a deficient number, since it is larger than the sum of its proper divisors (56611).

108851681 is an equidigital number, since it uses as much as digits as its factorization.

108851681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56610.

The product of its (nonzero) digits is 15360, while the sum is 38.

The square root of 108851681 is about 10433.2008990530. The cubic root of 108851681 is about 477.4688535371.

The spelling of 108851681 in words is "one hundred eight million, eight hundred fifty-one thousand, six hundred eighty-one".