395352021 has 16 divisors (see below), whose sum is σ = 545753088. Its totient is φ = 254310000.

The previous prime is 395351989. The next prime is 395352031. The reversal of 395352021 is 120253593.

It is not a de Polignac number, because 395352021 - 2⁵ = 395351989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 395352021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395352031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26146 + ... + 38396.

It is an arithmetic number, because the mean of its divisors is an integer number (34109568).

Almost surely, 2^395352021 is an apocalyptic number.

395352021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

395352021 is a deficient number, since it is larger than the sum of its proper divisors (150401067).

395352021 is a wasteful number, since it uses less digits than its factorization.

395352021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12632.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 395352021 is about 19883.4609914874. The cubic root of 395352021 is about 733.9412903122.

The spelling of 395352021 in words is "three hundred ninety-five million, three hundred fifty-two thousand, twenty-one".