321420220 has 24 divisors (see below), whose sum is σ = 736345008. Its totient is φ = 116880000.

The previous prime is 321420217. The next prime is 321420233. The reversal of 321420220 is 22024123.

It is a junction number, because it is equal to n+sod(n) for n = 321420194 and 321420203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730281 + ... + 730720.

It is an arithmetic number, because the mean of its divisors is an integer number (30681042).

Almost surely, 2^321420220 is an apocalyptic number.

It is an amenable number.

321420220 is an abundant number, since it is smaller than the sum of its proper divisors (414924788).

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

321420220 is a wasteful number, since it uses less digits than its factorization.

321420220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461021 (or 1461019 counting only the distinct ones).

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

The square root of 321420220 is about 17928.1962282880. The cubic root of 321420220 is about 685.0007778775. Note that the first 3 decimals are identical.

Adding to 321420220 its reverse (22024123), we get a palindrome (343444343).

The spelling of 321420220 in words is "three hundred twenty-one million, four hundred twenty thousand, two hundred twenty".