38521 has 4 divisors (see below), whose sum is σ = 44032. Its totient is φ = 33012.

The previous prime is 38501. The next prime is 38543. The reversal of 38521 is 12583.

It is a happy number.

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 not a de Polignac number, because 38521 - 2^{7} = 38393 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (38501) 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, 2745 + ... + 2758.

It is an arithmetic number, because the mean of its divisors is an integer number (11008).

2^{38521} is an apocalyptic number.

It is an amenable number.

38521 is a deficient number, since it is larger than the sum of its proper divisors (5511).

38521 is an equidigital number, since it uses as much as digits as its factorization.

38521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5510.

The product of its digits is 240, while the sum is 19.

The square root of 38521 is about 196.2676743634. The cubic root of 38521 is about 33.7727053434.

It can be divided in two parts, 385 and 21, that added together give a triangular number (406 = T_{28}).

The spelling of 38521 in words is "thirty-eight thousand, five hundred twenty-one".

• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.024 sec. • engine limits •