395776221 has 4 divisors (see below), whose sum is σ = 527701632. Its totient is φ = 263850812.

The previous prime is 395776217. The next prime is 395776243. The reversal of 395776221 is 122677593.

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 395776221 - 2² = 395776217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395776261) 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, 65962701 + ... + 65962706.

It is an arithmetic number, because the mean of its divisors is an integer number (131925408).

Almost surely, 2^395776221 is an apocalyptic number.

It is an amenable number.

395776221 is a deficient number, since it is larger than the sum of its proper divisors (131925411).

395776221 is a wasteful number, since it uses less digits than its factorization.

395776221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131925410.

The product of its digits is 158760, while the sum is 42.

The square root of 395776221 is about 19894.1252886373. The cubic root of 395776221 is about 734.2036949485.

The spelling of 395776221 in words is "three hundred ninety-five million, seven hundred seventy-six thousand, two hundred twenty-one".