321534138 has 16 divisors (see below), whose sum is σ = 643262400. Its totient is φ = 107145696.

The previous prime is 321534137. The next prime is 321534149. The reversal of 321534138 is 831435123.

321534138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (321534137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22131 + ... + 33657.

It is an arithmetic number, because the mean of its divisors is an integer number (40203900).

Almost surely, 2^321534138 is an apocalyptic number.

321534138 is an abundant number, since it is smaller than the sum of its proper divisors (321728262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321534138 is a wasteful number, since it uses less digits than its factorization.

321534138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16181.

The product of its digits is 8640, while the sum is 30.

The square root of 321534138 is about 17931.3730093376. The cubic root of 321534138 is about 685.0816944852.

The spelling of 321534138 in words is "three hundred twenty-one million, five hundred thirty-four thousand, one hundred thirty-eight".