213222020 has 48 divisors (see below), whose sum is σ = 494399808. Its totient is φ = 76594560.

The previous prime is 213222013. The next prime is 213222049. The reversal of 213222020 is 20222312.

It is a junction number, because it is equal to n+sod(n) for n = 213221986 and 213222004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12422 + ... + 24098.

It is an arithmetic number, because the mean of its divisors is an integer number (10299996).

Almost surely, 2^213222020 is an apocalyptic number.

213222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213222020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247199904).

213222020 is an abundant number, since it is smaller than the sum of its proper divisors (281177788).

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

213222020 is a wasteful number, since it uses less digits than its factorization.

213222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11780 (or 11778 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 213222020 is about 14602.1238181300. The cubic root of 213222020 is about 597.4166897728.

Adding to 213222020 its reverse (20222312), we get a palindrome (233444332).

The spelling of 213222020 in words is "two hundred thirteen million, two hundred twenty-two thousand, twenty".