204257147 has 2 divisors, whose sum is σ = 204257148. Its totient is φ = 204257146.

The previous prime is 204257143. The next prime is 204257189. The reversal of 204257147 is 741752402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204257147 - 2² = 204257143 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (204257143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102128573 + 102128574.

It is an arithmetic number, because the mean of its divisors is an integer number (102128574).

Almost surely, 2^204257147 is an apocalyptic number.

204257147 is a deficient number, since it is larger than the sum of its proper divisors (1).

204257147 is an equidigital number, since it uses as much as digits as its factorization.

204257147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 204257147 is about 14291.8559676481. The cubic root of 204257147 is about 588.9237748976.

It can be divided in two parts, 20425 and 7147, that added together give a palindrome (27572).

The spelling of 204257147 in words is "two hundred four million, two hundred fifty-seven thousand, one hundred forty-seven".