321402220 has 12 divisors (see below), whose sum is σ = 674944704. Its totient is φ = 128560880.

The previous prime is 321402131. The next prime is 321402223. The reversal of 321402220 is 22204123.

It is a junction number, because it is equal to n+sod(n) for n = 321402194 and 321402203.

It is not an unprimeable number, because it can be changed into a prime (321402223) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8035036 + ... + 8035075.

It is an arithmetic number, because the mean of its divisors is an integer number (56245392).

Almost surely, 2^321402220 is an apocalyptic number.

It is an amenable number.

321402220 is an abundant number, since it is smaller than the sum of its proper divisors (353542484).

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

321402220 is a wasteful number, since it uses less digits than its factorization.

321402220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16070120 (or 16070118 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 321402220 is about 17927.6942187220. The cubic root of 321402220 is about 684.9879906254.

Adding to 321402220 its reverse (22204123), we get a palindrome (343606343).

The spelling of 321402220 in words is "three hundred twenty-one million, four hundred two thousand, two hundred twenty".