168186241 has 4 divisors (see below), whose sum is σ = 168668500. Its totient is φ = 167703984.

The previous prime is 168186209. The next prime is 168186251. The reversal of 168186241 is 142681861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 142681861 = 7 ⋅20383123.

It can be written as a sum of positive squares in 2 ways, for example, as 89491600 + 78694641 = 9460^2 + 8871^2 .

It is a cyclic number.

It is not a de Polignac number, because 168186241 - 2⁵ = 168186209 is a prime.

It is a super-2 number, since 2×168186241² = 56573223323420162, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168186241.

It is not an unprimeable number, because it can be changed into a prime (168186251) 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, 240606 + ... + 241303.

It is an arithmetic number, because the mean of its divisors is an integer number (42167125).

Almost surely, 2^168186241 is an apocalyptic number.

It is an amenable number.

168186241 is a deficient number, since it is larger than the sum of its proper divisors (482259).

168186241 is an equidigital number, since it uses as much as digits as its factorization.

168186241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482258.

The product of its digits is 18432, while the sum is 37.

The square root of 168186241 is about 12968.6638093521. The cubic root of 168186241 is about 551.9886587059.

The spelling of 168186241 in words is "one hundred sixty-eight million, one hundred eighty-six thousand, two hundred forty-one".