204213320431 has 4 divisors (see below), whose sum is σ = 204323887152. Its totient is φ = 204102753712.

The previous prime is 204213320419. The next prime is 204213320459. The reversal of 204213320431 is 134023312402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204213320431 is a prime.

It is a super-2 number, since 2×204213320431² (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 = 204213320396 and 204213320405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204213320461) 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, 55280590 + ... + 55284283.

It is an arithmetic number, because the mean of its divisors is an integer number (51080971788).

Almost surely, 2^204213320431 is an apocalyptic number.

204213320431 is a deficient number, since it is larger than the sum of its proper divisors (110566721).

204213320431 is a wasteful number, since it uses less digits than its factorization.

204213320431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110566720.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 204213320431 its reverse (134023312402), we get a palindrome (338236632833).

The spelling of 204213320431 in words is "two hundred four billion, two hundred thirteen million, three hundred twenty thousand, four hundred thirty-one".