354644221 has 4 divisors (see below), whose sum is σ = 360655200. Its totient is φ = 348633244.

The previous prime is 354644207. The next prime is 354644231. The reversal of 354644221 is 122446453.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 354644221 - 2²⁵ = 321089789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (354644201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3005401 + ... + 3005518.

It is an arithmetic number, because the mean of its divisors is an integer number (90163800).

Almost surely, 2^354644221 is an apocalyptic number.

It is an amenable number.

354644221 is a deficient number, since it is larger than the sum of its proper divisors (6010979).

354644221 is an equidigital number, since it uses as much as digits as its factorization.

354644221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6010978.

The product of its digits is 23040, while the sum is 31.

The square root of 354644221 is about 18831.9999203483. Note that the first 4 decimals coincide. The cubic root of 354644221 is about 707.8332548311.

The spelling of 354644221 in words is "three hundred fifty-four million, six hundred forty-four thousand, two hundred twenty-one".