213271808 has 72 divisors (see below), whose sum is σ = 452541600. Its totient is φ = 100030464.

The previous prime is 213271781. The next prime is 213271813. The reversal of 213271808 is 808172312.

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 792698 + ... + 792966.

It is an arithmetic number, because the mean of its divisors is an integer number (6285300).

Almost surely, 2^213271808 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 213271808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226270800).

213271808 is an abundant number, since it is smaller than the sum of its proper divisors (239269792).

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

213271808 is a wasteful number, since it uses less digits than its factorization.

213271808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 213271808 is about 14603.8285391195. The cubic root of 213271808 is about 597.4631857012.

The spelling of 213271808 in words is "two hundred thirteen million, two hundred seventy-one thousand, eight hundred eight".