213545444434 has 16 divisors (see below), whose sum is σ = 375006635136. Its totient is φ = 89287293600.

The previous prime is 213545444417. The next prime is 213545444447. The reversal of 213545444434 is 434444545312.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 186014622 + ... + 186015769.

It is an arithmetic number, because the mean of its divisors is an integer number (23437914696).

Almost surely, 2^213545444434 is an apocalyptic number.

213545444434 is a deficient number, since it is larger than the sum of its proper divisors (161461190702).

213545444434 is a wasteful number, since it uses less digits than its factorization.

213545444434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372030441.

The product of its digits is 1843200, while the sum is 43.

Adding to 213545444434 its reverse (434444545312), we get a palindrome (647989989746).

The spelling of 213545444434 in words is "two hundred thirteen billion, five hundred forty-five million, four hundred forty-four thousand, four hundred thirty-four".