213404430004231 has 4 divisors (see below), whose sum is σ = 215084779846912. Its totient is φ = 211724080161552.

The previous prime is 213404430004229. The next prime is 213404430004237. The reversal of 213404430004231 is 132400034404312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213404430004231 - 2¹ = 213404430004229 is a prime.

It is a super-2 number, since 2×213404430004231² (a number of 29 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 = 213404430004193 and 213404430004202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213404430004237) 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, 840174921150 + ... + 840174921403.

It is an arithmetic number, because the mean of its divisors is an integer number (53771194961728).

Almost surely, 2^{213404430004231} is an apocalyptic number.

213404430004231 is a deficient number, since it is larger than the sum of its proper divisors (1680349842681).

213404430004231 is a wasteful number, since it uses less digits than its factorization.

213404430004231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680349842680.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 213404430004231 its reverse (132400034404312), we get a palindrome (345804464408543).

The spelling of 213404430004231 in words is "two hundred thirteen trillion, four hundred four billion, four hundred thirty million, four thousand, two hundred thirty-one".