395255521 has 4 divisors (see below), whose sum is σ = 399169044. Its totient is φ = 391342000.

The previous prime is 395255519. The next prime is 395255533. The reversal of 395255521 is 125552593.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 261274896 + 133980625 = 16164^2 + 11575^2 .

It is a cyclic number.

It is not a de Polignac number, because 395255521 - 2¹ = 395255519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (395255551) 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 3 ways as a sum of consecutive naturals, for example, 1956610 + ... + 1956811.

It is an arithmetic number, because the mean of its divisors is an integer number (99792261).

Almost surely, 2^395255521 is an apocalyptic number.

It is an amenable number.

395255521 is a deficient number, since it is larger than the sum of its proper divisors (3913523).

395255521 is a wasteful number, since it uses less digits than its factorization.

395255521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3913522.

The product of its digits is 67500, while the sum is 37.

The square root of 395255521 is about 19881.0342034815. The cubic root of 395255521 is about 733.8815704558.

The spelling of 395255521 in words is "three hundred ninety-five million, two hundred fifty-five thousand, five hundred twenty-one".