395572321 has 3 divisors (see below), whose sum is σ = 395592211. Its totient is φ = 395552432.

The previous prime is 395572319. The next prime is 395572363. The reversal of 395572321 is 123275593.

The square root of 395572321 is 19889.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 123275593 = 7 ⋅17610799.

It can be written as a sum of positive squares in only one way, i.e., 372914721 + 22657600 = 19311^2 + 4760^2 .

It is not a de Polignac number, because 395572321 - 2¹ = 395572319 is a prime.

It is a super-2 number, since 2×395572321² = 312954922282654082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (395572391) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 9945 + ... + 29833.

Almost surely, 2^395572321 is an apocalyptic number.

395572321 is the 19889-th square number.

395572321 is the 9945-th centered octagonal number.

It is an amenable number.

395572321 is a deficient number, since it is larger than the sum of its proper divisors (19890).

395572321 is an frugal number, since it uses more digits than its factorization.

395572321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39778 (or 19889 counting only the distinct ones).

The product of its digits is 56700, while the sum is 37.

The cubic root of 395572321 is about 734.0775884591.

The spelling of 395572321 in words is "three hundred ninety-five million, five hundred seventy-two thousand, three hundred twenty-one".