38231521 has 12 divisors (see below), whose sum is σ = 40848192. Its totient is φ = 35774528.

The previous prime is 38231509. The next prime is 38231527. The reversal of 38231521 is 12513283.

It is not a de Polignac number, because 38231521 - 2⁵ = 38231489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38231527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75756 + ... + 76258.

It is an arithmetic number, because the mean of its divisors is an integer number (3404016).

Almost surely, 2^38231521 is an apocalyptic number.

It is an amenable number.

38231521 is a deficient number, since it is larger than the sum of its proper divisors (2616671).

38231521 is a wasteful number, since it uses less digits than its factorization.

38231521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800 (or 783 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 38231521 is about 6183.1643193433. The cubic root of 38231521 is about 336.8789375752.

The spelling of 38231521 in words is "thirty-eight million, two hundred thirty-one thousand, five hundred twenty-one".