204040311331 has 2 divisors, whose sum is σ = 204040311332. Its totient is φ = 204040311330.

The previous prime is 204040311323. The next prime is 204040311353. The reversal of 204040311331 is 133113040402.

It is an a-pointer prime, because the next prime (204040311353) can be obtained adding 204040311331 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204040311331 - 2³ = 204040311323 is a prime.

It is a super-2 number, since 2×204040311331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204040311311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102020155665 + 102020155666.

It is an arithmetic number, because the mean of its divisors is an integer number (102020155666).

Almost surely, 2^204040311331 is an apocalyptic number.

204040311331 is a deficient number, since it is larger than the sum of its proper divisors (1).

204040311331 is an equidigital number, since it uses as much as digits as its factorization.

204040311331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 204040311331 its reverse (133113040402), we get a palindrome (337153351733).

The spelling of 204040311331 in words is "two hundred four billion, forty million, three hundred eleven thousand, three hundred thirty-one".