321016400 has 60 divisors (see below), whose sum is σ = 811852800. Its totient is φ = 121645440.

The previous prime is 321016391. The next prime is 321016447. The reversal of 321016400 is 4610123.

321016400 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 an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13520 + ... + 28719.

It is an arithmetic number, because the mean of its divisors is an integer number (13530880).

Almost surely, 2^321016400 is an apocalyptic number.

It is an amenable number.

321016400 is an abundant number, since it is smaller than the sum of its proper divisors (490836400).

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

321016400 is a wasteful number, since it uses less digits than its factorization.

321016400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42276 (or 42265 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 321016400 is about 17916.9305406925. The cubic root of 321016400 is about 684.7137881141.

Adding to 321016400 its reverse (4610123), we get a palindrome (325626523).

The spelling of 321016400 in words is "three hundred twenty-one million, sixteen thousand, four hundred".