213241784 has 16 divisors (see below), whose sum is σ = 456946800. Its totient is φ = 91389312.

The previous prime is 213241783. The next prime is 213241849. The reversal of 213241784 is 487142312.

It is a self number, because there is not a number n which added to its sum of digits gives 213241784.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213241781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1903889 + ... + 1904000.

It is an arithmetic number, because the mean of its divisors is an integer number (28559175).

Almost surely, 2^213241784 is an apocalyptic number.

It is an amenable number.

213241784 is an abundant number, since it is smaller than the sum of its proper divisors (243705016).

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

213241784 is a wasteful number, since it uses less digits than its factorization.

213241784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3807902 (or 3807898 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 213241784 is about 14602.8005533185. The cubic root of 213241784 is about 597.4351478080.

The spelling of 213241784 in words is "two hundred thirteen million, two hundred forty-one thousand, seven hundred eighty-four".