213220444220 has 24 divisors (see below), whose sum is σ = 511729066464. Its totient is φ = 73104152256.

The previous prime is 213220444201. The next prime is 213220444271. The reversal of 213220444220 is 22444022312.

213220444220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 213220444220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761501447 + ... + 761501726.

It is an arithmetic number, because the mean of its divisors is an integer number (21322044436).

Almost surely, 2^213220444220 is an apocalyptic number.

213220444220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213220444220 is an abundant number, since it is smaller than the sum of its proper divisors (298508622244).

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

213220444220 is a wasteful number, since it uses less digits than its factorization.

213220444220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523003189 (or 1523003187 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 213220444220 its reverse (22444022312), we get a palindrome (235664466532).

The spelling of 213220444220 in words is "two hundred thirteen billion, two hundred twenty million, four hundred forty-four thousand, two hundred twenty".