342021220 has 48 divisors (see below), whose sum is σ = 729787968. Its totient is φ = 134628480.

The previous prime is 342021187. The next prime is 342021259. The reversal of 342021220 is 22120243.

It is a junction number, because it is equal to n+sod(n) for n = 342021194 and 342021203.

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, 386899 + ... + 387781.

It is an arithmetic number, because the mean of its divisors is an integer number (15203916).

Almost surely, 2^342021220 is an apocalyptic number.

It is an amenable number.

342021220 is an abundant number, since it is smaller than the sum of its proper divisors (387766748).

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

342021220 is a wasteful number, since it uses less digits than its factorization.

342021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180 (or 1178 counting only the distinct ones).

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

The square root of 342021220 is about 18493.8157231005. The cubic root of 342021220 is about 699.3335289185. Note that the first 3 decimals are identical.

Adding to 342021220 its reverse (22120243), we get a palindrome (364141463).

The spelling of 342021220 in words is "three hundred forty-two million, twenty-one thousand, two hundred twenty".