321140052 has 72 divisors (see below), whose sum is σ = 886194400. Its totient is φ = 101406816.

The previous prime is 321139993. The next prime is 321140089. The reversal of 321140052 is 250041123.

321140052 is a `hidden beast` number, since 3 + 211 + 400 + 52 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9774 + ... + 27162.

Almost surely, 2^321140052 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321140052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (443097200).

321140052 is an abundant number, since it is smaller than the sum of its proper divisors (565054348).

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

321140052 is a wasteful number, since it uses less digits than its factorization.

321140052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17427 (or 17413 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 321140052 is about 17920.3809111302. The cubic root of 321140052 is about 684.8016915782.

Adding to 321140052 its reverse (250041123), we get a palindrome (571181175).

The spelling of 321140052 in words is "three hundred twenty-one million, one hundred forty thousand, fifty-two".