38456221 has 4 divisors (see below), whose sum is σ = 38577852. Its totient is φ = 38334592.

The previous prime is 38456219. The next prime is 38456251. The reversal of 38456221 is 12265483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12265483 = 17 ⋅721499.

It can be written as a sum of positive squares in 2 ways, for example, as 14062500 + 24393721 = 3750^2 + 4939^2 .

It is a cyclic number.

It is not a de Polignac number, because 38456221 - 2¹ = 38456219 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 (38456251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60340 + ... + 60973.

It is an arithmetic number, because the mean of its divisors is an integer number (9644463).

Almost surely, 2^38456221 is an apocalyptic number.

It is an amenable number.

38456221 is a deficient number, since it is larger than the sum of its proper divisors (121631).

38456221 is a wasteful number, since it uses less digits than its factorization.

38456221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121630.

The product of its digits is 11520, while the sum is 31.

The square root of 38456221 is about 6201.3080071869. The cubic root of 38456221 is about 337.5376338464.

The spelling of 38456221 in words is "thirty-eight million, four hundred fifty-six thousand, two hundred twenty-one".