204344223131 has 4 divisors (see below), whose sum is σ = 207807684600. Its totient is φ = 200880761664.

The previous prime is 204344223119. The next prime is 204344223133. The reversal of 204344223131 is 131322443402.

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-204344223131 is a prime.

It is a super-2 number, since 2×204344223131² (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 = 204344223094 and 204344223103.

It is not an unprimeable number, because it can be changed into a prime (204344223133) 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, 1731730646 + ... + 1731730763.

It is an arithmetic number, because the mean of its divisors is an integer number (51951921150).

Almost surely, 2^204344223131 is an apocalyptic number.

204344223131 is a deficient number, since it is larger than the sum of its proper divisors (3463461469).

204344223131 is an equidigital number, since it uses as much as digits as its factorization.

204344223131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3463461468.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 204344223131 its reverse (131322443402), we get a palindrome (335666666533).

The spelling of 204344223131 in words is "two hundred four billion, three hundred forty-four million, two hundred twenty-three thousand, one hundred thirty-one".