213001116645 has 16 divisors (see below), whose sum is σ = 355619256192. Its totient is φ = 108661439040.

The previous prime is 213001116623. The next prime is 213001116659. The reversal of 213001116645 is 546611100312.

It is a happy number.

It is not a de Polignac number, because 213001116645 - 2¹⁷ = 213000985573 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308696926 + ... + 308697615.

It is an arithmetic number, because the mean of its divisors is an integer number (22226203512).

Almost surely, 2^213001116645 is an apocalyptic number.

It is an amenable number.

213001116645 is a deficient number, since it is larger than the sum of its proper divisors (142618139547).

213001116645 is a wasteful number, since it uses less digits than its factorization.

213001116645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617394572.

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 213001116645 its reverse (546611100312), we get a palindrome (759612216957).

The spelling of 213001116645 in words is "two hundred thirteen billion, one million, one hundred sixteen thousand, six hundred forty-five".