213020220 has 96 divisors (see below), whose sum is σ = 703696896. Its totient is φ = 47116800.

The previous prime is 213020161. The next prime is 213020231. The reversal of 213020220 is 22020312.

It is a super-2 number, since 2×213020220² = 90755228257696800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 213020196 and 213020205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4840 + ... + 21200.

It is an arithmetic number, because the mean of its divisors is an integer number (7330176).

Almost surely, 2^213020220 is an apocalyptic number.

213020220 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 213020220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351848448).

213020220 is an abundant number, since it is smaller than the sum of its proper divisors (490676676).

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

213020220 is a wasteful number, since it uses less digits than its factorization.

213020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16411 (or 16409 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 213020220 is about 14595.2122286728. The cubic root of 213020220 is about 597.2281589923.

Adding to 213020220 its reverse (22020312), we get a palindrome (235040532).

The spelling of 213020220 in words is "two hundred thirteen million, twenty thousand, two hundred twenty".