321622872 has 32 divisors (see below), whose sum is σ = 805560000. Its totient is φ = 107007264.

The previous prime is 321622871. The next prime is 321622879. The reversal of 321622872 is 278226123.

321622872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321622871) 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, 879 + ... + 25377.

It is an arithmetic number, because the mean of its divisors is an integer number (25173750).

Almost surely, 2^321622872 is an apocalyptic number.

It is an amenable number.

321622872 is an abundant number, since it is smaller than the sum of its proper divisors (483937128).

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

321622872 is a wasteful number, since it uses less digits than its factorization.

321622872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25055 (or 25051 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 321622872 is about 17933.8471054038. The cubic root of 321622872 is about 685.1447095129.

Adding to 321622872 its reverse (278226123), we get a palindrome (599848995).

The spelling of 321622872 in words is "three hundred twenty-one million, six hundred twenty-two thousand, eight hundred seventy-two".