213866233236 has 72 divisors (see below), whose sum is σ = 552330979200. Its totient is φ = 69743857536.

The previous prime is 213866233181. The next prime is 213866233247. The reversal of 213866233236 is 632332668312.

213866233236 is a `hidden beast` number, since 2 + 1 + 386 + 6 + 2 + 33 + 236 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 213866233191 and 213866233200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4403815 + ... + 4452113.

It is an arithmetic number, because the mean of its divisors is an integer number (7671263600).

Almost surely, 2^213866233236 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 213866233236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276165489600).

213866233236 is an abundant number, since it is smaller than the sum of its proper divisors (338464745964).

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

213866233236 is a wasteful number, since it uses less digits than its factorization.

213866233236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50973 (or 50968 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 45.

The spelling of 213866233236 in words is "two hundred thirteen billion, eight hundred sixty-six million, two hundred thirty-three thousand, two hundred thirty-six".