38521243 has 4 divisors (see below), whose sum is σ = 38694208. Its totient is φ = 38348280.

The previous prime is 38521229. The next prime is 38521261. The reversal of 38521243 is 34212583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34212583 = 103 ⋅332161.

It is a cyclic number.

It is not a de Polignac number, because 38521243 - 2¹³ = 38513051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38521283) 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, 86148 + ... + 86593.

It is an arithmetic number, because the mean of its divisors is an integer number (9673552).

Almost surely, 2^38521243 is an apocalyptic number.

38521243 is a deficient number, since it is larger than the sum of its proper divisors (172965).

38521243 is a wasteful number, since it uses less digits than its factorization.

38521243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172964.

The product of its digits is 5760, while the sum is 28.

The square root of 38521243 is about 6206.5483966533. The cubic root of 38521243 is about 337.7277635877.

The spelling of 38521243 in words is "thirty-eight million, five hundred twenty-one thousand, two hundred forty-three".