39355221 has 16 divisors (see below), whose sum is σ = 55944000. Its totient is φ = 24523008.

The previous prime is 39355201. The next prime is 39355237. The reversal of 39355221 is 12255393.

It is not a de Polignac number, because 39355221 - 2⁵ = 39355189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39355201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5010 + ... + 10188.

It is an arithmetic number, because the mean of its divisors is an integer number (3496500).

Almost surely, 2^39355221 is an apocalyptic number.

It is an amenable number.

39355221 is a deficient number, since it is larger than the sum of its proper divisors (16588779).

39355221 is a wasteful number, since it uses less digits than its factorization.

39355221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5348.

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

The square root of 39355221 is about 6273.3739725924. The cubic root of 39355221 is about 340.1476319656.

The spelling of 39355221 in words is "thirty-nine million, three hundred fifty-five thousand, two hundred twenty-one".