321240222 has 32 divisors (see below), whose sum is σ = 720429600. Its totient is φ = 106095744.

The previous prime is 321240209. The next prime is 321240233. The reversal of 321240222 is 222042123.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 321240195 and 321240204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21403 + ... + 33174.

It is an arithmetic number, because the mean of its divisors is an integer number (22513425).

Almost surely, 2^321240222 is an apocalyptic number.

321240222 is an abundant number, since it is smaller than the sum of its proper divisors (399189378).

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

321240222 is a wasteful number, since it uses less digits than its factorization.

321240222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54697 (or 54691 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 321240222 is about 17923.1755556877. The cubic root of 321240222 is about 684.8728852875.

Adding to 321240222 its reverse (222042123), we get a palindrome (543282345).

It can be divided in two parts, 3212 and 40222, that added together give a palindrome (43434).

The spelling of 321240222 in words is "three hundred twenty-one million, two hundred forty thousand, two hundred twenty-two".