38507221 has 8 divisors (see below), whose sum is σ = 40353984. Its totient is φ = 36674880.

The previous prime is 38507219. The next prime is 38507251. The reversal of 38507221 is 12270583.

38507221 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 not a de Polignac number, because 38507221 - 2¹ = 38507219 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 38507221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38507201) 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 7 ways as a sum of consecutive naturals, for example, 2070 + ... + 9016.

It is an arithmetic number, because the mean of its divisors is an integer number (5044248).

Almost surely, 2^38507221 is an apocalyptic number.

It is an amenable number.

38507221 is a deficient number, since it is larger than the sum of its proper divisors (1846763).

38507221 is a wasteful number, since it uses less digits than its factorization.

38507221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7211.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 38507221 is about 6205.4186804760. The cubic root of 38507221 is about 337.6867801973.

The spelling of 38507221 in words is "thirty-eight million, five hundred seven thousand, two hundred twenty-one".