213683581439 has 4 divisors (see below), whose sum is σ = 213685432224. Its totient is φ = 213681730656.

The previous prime is 213683581421. The next prime is 213683581451. The reversal of 213683581439 is 934185386312.

It is a happy number.

213683581439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213683581439 - 2¹² = 213683577343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213683583439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739802 + ... + 987255.

It is an arithmetic number, because the mean of its divisors is an integer number (53421358056).

Almost surely, 2^213683581439 is an apocalyptic number.

213683581439 is a deficient number, since it is larger than the sum of its proper divisors (1850785).

213683581439 is a wasteful number, since it uses less digits than its factorization.

213683581439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850784.

The product of its digits is 3732480, while the sum is 53.

The spelling of 213683581439 in words is "two hundred thirteen billion, six hundred eighty-three million, five hundred eighty-one thousand, four hundred thirty-nine".