213843456 has 160 divisors (see below), whose sum is σ = 654720000. Its totient is φ = 68843520.

The previous prime is 213843403. The next prime is 213843457. The reversal of 213843456 is 654348312.

213843456 is a `hidden beast` number, since 213 + 8 + 434 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 213843456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213843457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428295 + ... + 428793.

It is an arithmetic number, because the mean of its divisors is an integer number (4092000).

Almost surely, 2^213843456 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 213843456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327360000).

213843456 is an abundant number, since it is smaller than the sum of its proper divisors (440876544).

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

213843456 is an equidigital number, since it uses as much as digits as its factorization.

213843456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557 (or 535 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 213843456 is about 14623.3872956986. The cubic root of 213843456 is about 597.9965175429.

The spelling of 213843456 in words is "two hundred thirteen million, eight hundred forty-three thousand, four hundred fifty-six".