38518521 has 8 divisors (see below), whose sum is σ = 52450944. Its totient is φ = 25132560.

The previous prime is 38518507. The next prime is 38518531. The reversal of 38518521 is 12581583.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 38518521 - 2⁶ = 38518457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38518531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136450 + ... + 136731.

It is an arithmetic number, because the mean of its divisors is an integer number (6556368).

Almost surely, 2^38518521 is an apocalyptic number.

It is an amenable number.

38518521 is a deficient number, since it is larger than the sum of its proper divisors (13932423).

38518521 is a wasteful number, since it uses less digits than its factorization.

38518521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273231.

The product of its digits is 9600, while the sum is 33.

The square root of 38518521 is about 6206.3291082572. The cubic root of 38518521 is about 337.7198085257.

The spelling of 38518521 in words is "thirty-eight million, five hundred eighteen thousand, five hundred twenty-one".