212161604032 has 112 divisors (see below), whose sum is σ = 487628305920. Its totient is φ = 89705659392.

The previous prime is 212161604027. The next prime is 212161604051. The reversal of 212161604032 is 230406161212.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29632069 + ... + 29639227.

It is an arithmetic number, because the mean of its divisors is an integer number (4353824160).

Almost surely, 2^212161604032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212161604032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243814152960).

212161604032 is an abundant number, since it is smaller than the sum of its proper divisors (275466701888).

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

212161604032 is an equidigital number, since it uses as much as digits as its factorization.

212161604032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8058 (or 8048 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 212161604032 its reverse (230406161212), we get a palindrome (442567765244).

The spelling of 212161604032 in words is "two hundred twelve billion, one hundred sixty-one million, six hundred four thousand, thirty-two".