38471221 has 16 divisors (see below), whose sum is σ = 41693184. Its totient is φ = 35368704.

The previous prime is 38471179. The next prime is 38471261. The reversal of 38471221 is 12217483.

It is not a de Polignac number, because 38471221 - 2¹¹ = 38469173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38471221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38471261) 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, 222291 + ... + 222463.

It is an arithmetic number, because the mean of its divisors is an integer number (2605824).

Almost surely, 2^38471221 is an apocalyptic number.

It is an amenable number.

38471221 is a deficient number, since it is larger than the sum of its proper divisors (3221963).

38471221 is a wasteful number, since it uses less digits than its factorization.

38471221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420.

The product of its digits is 2688, while the sum is 28.

The square root of 38471221 is about 6202.5173115438. The cubic root of 38471221 is about 337.5815141014.

The spelling of 38471221 in words is "thirty-eight million, four hundred seventy-one thousand, two hundred twenty-one".