146221173 has 16 divisors (see below), whose sum is σ = 247570560. Its totient is φ = 83554848.

The previous prime is 146221139. The next prime is 146221213. The reversal of 146221173 is 371122641.

146221173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 146221173 - 2⁹ = 146220661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146221133) 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, 386640 + ... + 387017.

It is an arithmetic number, because the mean of its divisors is an integer number (15473160).

Almost surely, 2^146221173 is an apocalyptic number.

It is an amenable number.

146221173 is a deficient number, since it is larger than the sum of its proper divisors (101349387).

146221173 is an equidigital number, since it uses as much as digits as its factorization.

146221173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773673 (or 773667 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 146221173 is about 12092.1947139467. The cubic root of 146221173 is about 526.8295029165.

The spelling of 146221173 in words is "one hundred forty-six million, two hundred twenty-one thousand, one hundred seventy-three".