204155415031027 has 2 divisors, whose sum is σ = 204155415031028. Its totient is φ = 204155415031026.

The previous prime is 204155415030979. The next prime is 204155415031039. The reversal of 204155415031027 is 720130514551402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204155415031027 - 2¹⁵ = 204155414998259 is a prime.

It is not a weakly prime, because it can be changed into another prime (204155415034027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102077707515513 + 102077707515514.

It is an arithmetic number, because the mean of its divisors is an integer number (102077707515514).

Almost surely, 2^{204155415031027} is an apocalyptic number.

204155415031027 is a deficient number, since it is larger than the sum of its proper divisors (1).

204155415031027 is an equidigital number, since it uses as much as digits as its factorization.

204155415031027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168000, while the sum is 40.

Adding to 204155415031027 its reverse (720130514551402), we get a palindrome (924285929582429).

The spelling of 204155415031027 in words is "two hundred four trillion, one hundred fifty-five billion, four hundred fifteen million, thirty-one thousand, twenty-seven".