213965375543 has 4 divisors (see below), whose sum is σ = 214778932368. Its totient is φ = 213151818720.

The previous prime is 213965375509. The next prime is 213965375579. The reversal of 213965375543 is 345573569312.

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 213965375543 - 2⁸ = 213965375287 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 (213965375243) 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, 406778018 + ... + 406778543.

It is an arithmetic number, because the mean of its divisors is an integer number (53694733092).

Almost surely, 2^213965375543 is an apocalyptic number.

213965375543 is a deficient number, since it is larger than the sum of its proper divisors (813556825).

213965375543 is an equidigital number, since it uses as much as digits as its factorization.

213965375543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813556824.

The product of its digits is 10206000, while the sum is 53.

The spelling of 213965375543 in words is "two hundred thirteen billion, nine hundred sixty-five million, three hundred seventy-five thousand, five hundred forty-three".