213107370643 has 4 divisors (see below), whose sum is σ = 213108315448. Its totient is φ = 213106425840.

The previous prime is 213107370617. The next prime is 213107370727. The reversal of 213107370643 is 346073701312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213107370643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213107370043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85780 + ... + 658462.

It is an arithmetic number, because the mean of its divisors is an integer number (53277078862).

Almost surely, 2^213107370643 is an apocalyptic number.

213107370643 is a deficient number, since it is larger than the sum of its proper divisors (944805).

213107370643 is an equidigital number, since it uses as much as digits as its factorization.

213107370643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944804.

The product of its (nonzero) digits is 63504, while the sum is 37.

The spelling of 213107370643 in words is "two hundred thirteen billion, one hundred seven million, three hundred seventy thousand, six hundred forty-three".