213115453236 has 144 divisors (see below), whose sum is σ = 629165846400. Its totient is φ = 60799576320.

The previous prime is 213115453231. The next prime is 213115453249. The reversal of 213115453236 is 632354511312.

213115453236 is a `hidden beast` number, since 2 + 1 + 3 + 115 + 4 + 532 + 3 + 6 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 213115453236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213115453231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8519980 + ... + 8544956.

Almost surely, 2^213115453236 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 213115453236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314582923200).

213115453236 is an abundant number, since it is smaller than the sum of its proper divisors (416050393164).

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

213115453236 is a wasteful number, since it uses less digits than its factorization.

213115453236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25699 (or 25680 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

Adding to 213115453236 its reverse (632354511312), we get a palindrome (845469964548).

The spelling of 213115453236 in words is "two hundred thirteen billion, one hundred fifteen million, four hundred fifty-three thousand, two hundred thirty-six".