38415221 has 12 divisors (see below), whose sum is σ = 43410528. Its totient is φ = 33915024.

The previous prime is 38415199. The next prime is 38415233. The reversal of 38415221 is 12251483.

38415221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 38415221 - 2²² = 34220917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38415241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1055 + ... + 8828.

It is an arithmetic number, because the mean of its divisors is an integer number (3617544).

Almost surely, 2^38415221 is an apocalyptic number.

It is an amenable number.

38415221 is a deficient number, since it is larger than the sum of its proper divisors (4995307).

38415221 is a wasteful number, since it uses less digits than its factorization.

38415221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9932 (or 9919 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 38415221 is about 6198.0013714100. The cubic root of 38415221 is about 337.4176362344.

The spelling of 38415221 in words is "thirty-eight million, four hundred fifteen thousand, two hundred twenty-one".