321400220 has 24 divisors (see below), whose sum is σ = 677923344. Its totient is φ = 127991936.

The previous prime is 321400193. The next prime is 321400267. The reversal of 321400220 is 22004123.

It is a junction number, because it is equal to n+sod(n) for n = 321400195 and 321400204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30857 + ... + 39936.

It is an arithmetic number, because the mean of its divisors is an integer number (28246806).

Almost surely, 2^321400220 is an apocalyptic number.

It is an amenable number.

321400220 is an abundant number, since it is smaller than the sum of its proper divisors (356523124).

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

321400220 is a wasteful number, since it uses less digits than its factorization.

321400220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71029 (or 71027 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 321400220 is about 17927.6384390137. The cubic root of 321400220 is about 684.9865697901.

Adding to 321400220 its reverse (22004123), we get a palindrome (343404343).

The spelling of 321400220 in words is "three hundred twenty-one million, four hundred thousand, two hundred twenty".