213552443412 has 384 divisors, whose sum is σ = 762663444480. Its totient is φ = 49934776320.

The previous prime is 213552443387. The next prime is 213552443413. The reversal of 213552443412 is 214344255312.

It is a happy number.

213552443412 is a `hidden beast` number, since 21 + 3 + 55 + 244 + 341 + 2 = 666.

213552443412 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213552443413) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3218718 + ... + 3284394.

It is an arithmetic number, because the mean of its divisors is an integer number (1986102720).

Almost surely, 2^213552443412 is an apocalyptic number.

213552443412 is a gapful number since it is divisible by the number (22) 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 213552443412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381331722240).

213552443412 is an abundant number, since it is smaller than the sum of its proper divisors (549111001068).

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

213552443412 is a wasteful number, since it uses less digits than its factorization.

213552443412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65748 (or 65740 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

Adding to 213552443412 its reverse (214344255312), we get a palindrome (427896698724).

The spelling of 213552443412 in words is "two hundred thirteen billion, five hundred fifty-two million, four hundred forty-three thousand, four hundred twelve".