213081084 has 48 divisors (see below), whose sum is σ = 557625600. Its totient is φ = 70359408.

The previous prime is 213081079. The next prime is 213081097. The reversal of 213081084 is 480180312.

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 15 ways as a sum of consecutive naturals, for example, 2337 + ... + 20775.

It is an arithmetic number, because the mean of its divisors is an integer number (11617200).

Almost surely, 2^213081084 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 213081084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278812800).

213081084 is an abundant number, since it is smaller than the sum of its proper divisors (344544516).

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

213081084 is a wasteful number, since it uses less digits than its factorization.

213081084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18559 (or 18551 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 213081084 is about 14597.2971470749. The cubic root of 213081084 is about 597.2850334575.

The spelling of 213081084 in words is "two hundred thirteen million, eighty-one thousand, eighty-four".