213822781489 has 4 divisors (see below), whose sum is σ = 213835676656. Its totient is φ = 213809886324.

The previous prime is 213822781451. The next prime is 213822781531. The reversal of 213822781489 is 984187228312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213822781489 - 2¹⁷ = 213822650417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213822781429) 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, 6422679 + ... + 6455884.

It is an arithmetic number, because the mean of its divisors is an integer number (53458919164).

Almost surely, 2^213822781489 is an apocalyptic number.

It is an amenable number.

213822781489 is a deficient number, since it is larger than the sum of its proper divisors (12895167).

213822781489 is a wasteful number, since it uses less digits than its factorization.

213822781489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12895166.

The product of its digits is 3096576, while the sum is 55.

The spelling of 213822781489 in words is "two hundred thirteen billion, eight hundred twenty-two million, seven hundred eighty-one thousand, four hundred eighty-nine".