146166221 has 16 divisors (see below), whose sum is σ = 165168000. Its totient is φ = 128521728.

The previous prime is 146166203. The next prime is 146166227. The reversal of 146166221 is 122661641.

146166221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 146166221 - 2⁶ = 146166157 is a prime.

It is a super-2 number, since 2×146166221² = 42729128322841682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146166227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20480 + ... + 26678.

It is an arithmetic number, because the mean of its divisors is an integer number (10323000).

Almost surely, 2^146166221 is an apocalyptic number.

It is an amenable number.

146166221 is a deficient number, since it is larger than the sum of its proper divisors (19001779).

146166221 is a wasteful number, since it uses less digits than its factorization.

146166221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6308.

The product of its digits is 3456, while the sum is 29.

The square root of 146166221 is about 12089.9222909000. The cubic root of 146166221 is about 526.7634979696.

The spelling of 146166221 in words is "one hundred forty-six million, one hundred sixty-six thousand, two hundred twenty-one".