8321538437 has 16 divisors (see below), whose sum is σ = 9260334720. Its totient is φ = 7437568512.

The previous prime is 8321538383. The next prime is 8321538451. The reversal of 8321538437 is 7348351238.

It is not a de Polignac number, because 8321538437 - 2¹² = 8321534341 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 (8321538497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22208 + ... + 130905.

It is an arithmetic number, because the mean of its divisors is an integer number (578770920).

Almost surely, 2^8321538437 is an apocalyptic number.

It is an amenable number.

8321538437 is a deficient number, since it is larger than the sum of its proper divisors (938796283).

8321538437 is a wasteful number, since it uses less digits than its factorization.

8321538437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153292.

The product of its digits is 483840, while the sum is 44.

The square root of 8321538437 is about 91222.4667338041. The cubic root of 8321538437 is about 2026.4436943273.

The spelling of 8321538437 in words is "eight billion, three hundred twenty-one million, five hundred thirty-eight thousand, four hundred thirty-seven".