108172261 has 4 divisors (see below), whose sum is σ = 108479052. Its totient is φ = 107865472.

The previous prime is 108172249. The next prime is 108172271. The reversal of 108172261 is 162271801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162271801 = 563 ⋅288227.

It can be written as a sum of positive squares in 2 ways, for example, as 35820225 + 72352036 = 5985^2 + 8506^2 .

It is a cyclic number.

It is not a de Polignac number, because 108172261 - 2¹¹ = 108170213 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 (108172231) 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, 152866 + ... + 153571.

It is an arithmetic number, because the mean of its divisors is an integer number (27119763).

Almost surely, 2^108172261 is an apocalyptic number.

It is an amenable number.

108172261 is a deficient number, since it is larger than the sum of its proper divisors (306791).

108172261 is an equidigital number, since it uses as much as digits as its factorization.

108172261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306790.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 108172261 is about 10400.5894544492. The cubic root of 108172261 is about 476.4733730327.

The spelling of 108172261 in words is "one hundred eight million, one hundred seventy-two thousand, two hundred sixty-one".