212322220 has 24 divisors (see below), whose sum is σ = 486411408. Its totient is φ = 77208000.

The previous prime is 212322211. The next prime is 212322239. The reversal of 212322220 is 22223212.

212322220 is nontrivially palindromic in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 212322194 and 212322203.

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, 482331 + ... + 482770.

It is an arithmetic number, because the mean of its divisors is an integer number (20267142).

Almost surely, 2^212322220 is an apocalyptic number.

212322220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212322220 is an abundant number, since it is smaller than the sum of its proper divisors (274089188).

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

212322220 is a wasteful number, since it uses less digits than its factorization.

212322220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965121 (or 965119 counting only the distinct ones).

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

The square root of 212322220 is about 14571.2806575126. The cubic root of 212322220 is about 596.5751358543.

Adding to 212322220 its reverse (22223212), we get a palindrome (234545432).

The spelling of 212322220 in words is "two hundred twelve million, three hundred twenty-two thousand, two hundred twenty".