213202244420 has 144 divisors (see below), whose sum is σ = 499487071104. Its totient is φ = 76374144000.

The previous prime is 213202244371. The next prime is 213202244441. The reversal of 213202244420 is 24442202312.

It is a super-2 number, since 2×213202244420² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213202244420.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80543537 + ... + 80546183.

It is an arithmetic number, because the mean of its divisors is an integer number (3468660216).

Almost surely, 2^213202244420 is an apocalyptic number.

213202244420 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 213202244420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249743535552).

213202244420 is an abundant number, since it is smaller than the sum of its proper divisors (286284826684).

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

213202244420 is a wasteful number, since it uses less digits than its factorization.

213202244420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3162 (or 3149 counting only the distinct ones).

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

Adding to 213202244420 its reverse (24442202312), we get a palindrome (237644446732).

The spelling of 213202244420 in words is "two hundred thirteen billion, two hundred two million, two hundred forty-four thousand, four hundred twenty".