146204221 has 8 divisors (see below), whose sum is σ = 154632800. Its totient is φ = 137849040.

The previous prime is 146204213. The next prime is 146204239. The reversal of 146204221 is 122402641.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 146204221 - 2³ = 146204213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 146204192 and 146204201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146204281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14226 + ... + 22243.

It is an arithmetic number, because the mean of its divisors is an integer number (19329100).

Almost surely, 2^146204221 is an apocalyptic number.

It is an amenable number.

146204221 is a deficient number, since it is larger than the sum of its proper divisors (8428579).

146204221 is a wasteful number, since it uses less digits than its factorization.

146204221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36699.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 146204221 is about 12091.4937456048. The cubic root of 146204221 is about 526.8091429857.

Adding to 146204221 its reverse (122402641), we get a palindrome (268606862).

The spelling of 146204221 in words is "one hundred forty-six million, two hundred four thousand, two hundred twenty-one".