395915521 has 8 divisors (see below), whose sum is σ = 421437600. Its totient is φ = 370861920.

The previous prime is 395915473. The next prime is 395915543. The reversal of 395915521 is 125519593.

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

It is a cyclic number.

It is not a de Polignac number, because 395915521 - 2¹¹ = 395913473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (395915551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115375 + ... + 118756.

It is an arithmetic number, because the mean of its divisors is an integer number (52679700).

Almost surely, 2^395915521 is an apocalyptic number.

It is an amenable number.

395915521 is a deficient number, since it is larger than the sum of its proper divisors (25522079).

395915521 is a wasteful number, since it uses less digits than its factorization.

395915521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234239.

The product of its digits is 60750, while the sum is 40.

The square root of 395915521 is about 19897.6260141757. The cubic root of 395915521 is about 734.2898232305.

The spelling of 395915521 in words is "three hundred ninety-five million, nine hundred fifteen thousand, five hundred twenty-one".