168213141 has 18 divisors (see below), whose sum is σ = 248283542. Its totient is φ = 109743120.

The previous prime is 168213107. The next prime is 168213167. The reversal of 168213141 is 141312861.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 161036100 + 7177041 = 12690^2 + 2679^2 .

It is not a de Polignac number, because 168213141 - 2¹⁰ = 168212117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168213541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15651 + ... + 24111.

Almost surely, 2^168213141 is an apocalyptic number.

It is an amenable number.

168213141 is a deficient number, since it is larger than the sum of its proper divisors (80070401).

168213141 is an equidigital number, since it uses as much as digits as its factorization.

168213141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8561 (or 8511 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 168213141 is about 12969.7008832124. The cubic root of 168213141 is about 552.0180858126.

The spelling of 168213141 in words is "one hundred sixty-eight million, two hundred thirteen thousand, one hundred forty-one".