213837607643 has 16 divisors (see below), whose sum is σ = 236515445376. Its totient is φ = 191713616640.

The previous prime is 213837607631. The next prime is 213837607649. The reversal of 213837607643 is 346706738312.

It is a cyclic number.

It is not a de Polignac number, because 213837607643 - 2⁶ = 213837607579 is a prime.

It is a super-2 number, since 2×213837607643² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213837607591 and 213837607600.

It is not an unprimeable number, because it can be changed into a prime (213837607649) by changing a digit.

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, 52121 + ... + 656042.

It is an arithmetic number, because the mean of its divisors is an integer number (14782215336).

Almost surely, 2^213837607643 is an apocalyptic number.

213837607643 is a deficient number, since it is larger than the sum of its proper divisors (22677837733).

213837607643 is a wasteful number, since it uses less digits than its factorization.

213837607643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708554.

The product of its (nonzero) digits is 3048192, while the sum is 50.

The spelling of 213837607643 in words is "two hundred thirteen billion, eight hundred thirty-seven million, six hundred seven thousand, six hundred forty-three".