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39221 = 713431

39221 has 8 divisors (see below), whose sum is σ = 48384. Its totient is φ = 30960.

The previous prime is 39217. The next prime is 39227. The reversal of 39221 is 12293.

39221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 39221 - 22 = 39217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39221.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 39221.

It is not an unprimeable number, because it can be changed into a prime (39227) 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, 125 + ... + 306.

It is an arithmetic number, because the mean of its divisors is an integer number (6048).

239221 is an apocalyptic number.

It is an amenable number.

39221 is a deficient number, since it is larger than the sum of its proper divisors (9163).

39221 is a wasteful number, since it uses less digits than its factorization.

39221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451.

The product of its digits is 108, while the sum is 17.

The square root of 39221 is about 198.0429246401. The cubic root of 39221 is about 33.9760500307.

Subtracting from 39221 its sum of digits (17), we obtain a square (39204 = 1982).

The spelling of 39221 in words is "thirty-nine thousand, two hundred twenty-one".

Divisors: 1 7 13 91 431 3017 5603 39221