213557815589 has 4 divisors (see below), whose sum is σ = 224797700640. Its totient is φ = 202317930540.

The previous prime is 213557815577. The next prime is 213557815607. The reversal of 213557815589 is 985518755312.

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 213557815589 - 2¹⁶ = 213557750053 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 (213557818589) 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, 5619942497 + ... + 5619942534.

It is an arithmetic number, because the mean of its divisors is an integer number (56199425160).

Almost surely, 2^213557815589 is an apocalyptic number.

It is an amenable number.

213557815589 is a deficient number, since it is larger than the sum of its proper divisors (11239885051).

213557815589 is a wasteful number, since it uses less digits than its factorization.

213557815589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11239885050.

The product of its digits is 15120000, while the sum is 59.

The spelling of 213557815589 in words is "two hundred thirteen billion, five hundred fifty-seven million, eight hundred fifteen thousand, five hundred eighty-nine".