211355136 has 80 divisors (see below), whose sum is σ = 625666800. Its totient is φ = 70447104.

The previous prime is 211355129. The next prime is 211355141. The reversal of 211355136 is 631553112.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6180 + ... + 21468.

It is an arithmetic number, because the mean of its divisors is an integer number (7820835).

Almost surely, 2^211355136 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 211355136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312833400).

211355136 is an abundant number, since it is smaller than the sum of its proper divisors (414311664).

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

211355136 is an equidigital number, since it uses as much as digits as its factorization.

211355136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15316 (or 15294 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 211355136 is about 14538.0581922071. The cubic root of 211355136 is about 595.6679982076.

The spelling of 211355136 in words is "two hundred eleven million, three hundred fifty-five thousand, one hundred thirty-six".