395992221 has 8 divisors (see below), whose sum is σ = 528084480. Its totient is φ = 263947392.

The previous prime is 395992217. The next prime is 395992231. The reversal of 395992221 is 122299593.

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

It is not a de Polignac number, because 395992221 - 2² = 395992217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395992231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19396 + ... + 34178.

It is an arithmetic number, because the mean of its divisors is an integer number (66010560).

Almost surely, 2^395992221 is an apocalyptic number.

It is an amenable number.

395992221 is a deficient number, since it is larger than the sum of its proper divisors (132092259).

395992221 is a wasteful number, since it uses less digits than its factorization.

395992221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23715.

The product of its digits is 87480, while the sum is 42.

The square root of 395992221 is about 19899.5532864434. The cubic root of 395992221 is about 734.3372377166.

The spelling of 395992221 in words is "three hundred ninety-five million, nine hundred ninety-two thousand, two hundred twenty-one".