204155521306147 has 2 divisors, whose sum is σ = 204155521306148. Its totient is φ = 204155521306146.

The previous prime is 204155521306133. The next prime is 204155521306213. The reversal of 204155521306147 is 741603125551402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204155521306147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204155521306097 and 204155521306106.

It is not a weakly prime, because it can be changed into another prime (204155521306447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102077760653073 + 102077760653074.

It is an arithmetic number, because the mean of its divisors is an integer number (102077760653074).

Almost surely, 2^{204155521306147} is an apocalyptic number.

204155521306147 is a deficient number, since it is larger than the sum of its proper divisors (1).

204155521306147 is an equidigital number, since it uses as much as digits as its factorization.

204155521306147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008000, while the sum is 46.

Adding to 204155521306147 its reverse (741603125551402), we get a palindrome (945758646857549).

The spelling of 204155521306147 in words is "two hundred four trillion, one hundred fifty-five billion, five hundred twenty-one million, three hundred six thousand, one hundred forty-seven".