213422135973 has 4 divisors (see below), whose sum is σ = 284562847968. Its totient is φ = 142281423980.

The previous prime is 213422135911. The next prime is 213422136007. The reversal of 213422135973 is 379531224312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213422135973 - 2¹⁰ = 213422134949 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213423135973) 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, 35570355993 + ... + 35570355998.

It is an arithmetic number, because the mean of its divisors is an integer number (71140711992).

Almost surely, 2^213422135973 is an apocalyptic number.

It is an amenable number.

213422135973 is a deficient number, since it is larger than the sum of its proper divisors (71140711995).

213422135973 is an equidigital number, since it uses as much as digits as its factorization.

213422135973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71140711994.

The product of its digits is 272160, while the sum is 42.

The spelling of 213422135973 in words is "two hundred thirteen billion, four hundred twenty-two million, one hundred thirty-five thousand, nine hundred seventy-three".