38451221 has 4 divisors (see below), whose sum is σ = 38623872. Its totient is φ = 38278572.

The previous prime is 38451173. The next prime is 38451227. The reversal of 38451221 is 12215483.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38451221 - 2⁶ = 38451157 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 (38451227) 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 3 ways as a sum of consecutive naturals, for example, 85991 + ... + 86436.

It is an arithmetic number, because the mean of its divisors is an integer number (9655968).

Almost surely, 2^38451221 is an apocalyptic number.

It is an amenable number.

38451221 is a deficient number, since it is larger than the sum of its proper divisors (172651).

38451221 is a wasteful number, since it uses less digits than its factorization.

38451221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172650.

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

The square root of 38451221 is about 6200.9048533258. The cubic root of 38451221 is about 337.5230045591.

The spelling of 38451221 in words is "thirty-eight million, four hundred fifty-one thousand, two hundred twenty-one".