211612436252 has 72 divisors (see below), whose sum is σ = 438373192320. Its totient is φ = 89096595840.

The previous prime is 211612436227. The next prime is 211612436297. The reversal of 211612436252 is 252634216112.

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, 10307774 + ... + 10328282.

It is an arithmetic number, because the mean of its divisors is an integer number (6088516560).

Almost surely, 2^211612436252 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 211612436252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219186596160).

211612436252 is an abundant number, since it is smaller than the sum of its proper divisors (226760756068).

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

211612436252 is a wasteful number, since it uses less digits than its factorization.

211612436252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21451 (or 21442 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The spelling of 211612436252 in words is "two hundred eleven billion, six hundred twelve million, four hundred thirty-six thousand, two hundred fifty-two".