213664000 has 144 divisors (see below), whose sum is σ = 581607936. Its totient is φ = 77568000.

The previous prime is 213663959. The next prime is 213664019. The reversal of 213664000 is 466312.

213664000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 351697 + ... + 352303.

It is an arithmetic number, because the mean of its divisors is an integer number (4038944).

Almost surely, 2^213664000 is an apocalyptic number.

213664000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213664000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290803968).

213664000 is an abundant number, since it is smaller than the sum of its proper divisors (367943936).

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

213664000 is an equidigital number, since it uses as much as digits as its factorization.

213664000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649 (or 625 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 213664000 is about 14617.2500833775. The cubic root of 213664000 is about 597.8291925003.

The spelling of 213664000 in words is "two hundred thirteen million, six hundred sixty-four thousand".