168700221 has 24 divisors (see below), whose sum is σ = 265356000. Its totient is φ = 102870432.

The previous prime is 168700211. The next prime is 168700243. The reversal of 168700221 is 122007861.

It is not a de Polignac number, because 168700221 - 2⁶ = 168700157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168700211) 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 23 ways as a sum of consecutive naturals, for example, 12051 + ... + 21968.

It is an arithmetic number, because the mean of its divisors is an integer number (11056500).

Almost surely, 2^168700221 is an apocalyptic number.

It is an amenable number.

168700221 is a deficient number, since it is larger than the sum of its proper divisors (96655779).

168700221 is a wasteful number, since it uses less digits than its factorization.

168700221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34073 (or 34070 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 168700221 is about 12988.4649208442. The cubic root of 168700221 is about 552.5503824437.

It can be divided in two parts, 168700 and 221, that added together give a square (168921 = 411²).

The spelling of 168700221 in words is "one hundred sixty-eight million, seven hundred thousand, two hundred twenty-one".