213945824 has 12 divisors (see below), whose sum is σ = 421205904. Its totient is φ = 106972896.

The previous prime is 213945821. The next prime is 213945857. The reversal of 213945824 is 428549312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213945821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3342872 + ... + 3342935.

It is an arithmetic number, because the mean of its divisors is an integer number (35100492).

Almost surely, 2^213945824 is an apocalyptic number.

It is an amenable number.

213945824 is a deficient number, since it is larger than the sum of its proper divisors (207260080).

213945824 is an equidigital number, since it uses as much as digits as its factorization.

213945824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6685817 (or 6685809 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 213945824 is about 14626.8870235604. The cubic root of 213945824 is about 598.0919236921.

The spelling of 213945824 in words is "two hundred thirteen million, nine hundred forty-five thousand, eight hundred twenty-four".