205145153 has 2 divisors, whose sum is σ = 205145154. Its totient is φ = 205145152.

The previous prime is 205145123. The next prime is 205145167. The reversal of 205145153 is 351541502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104182849 + 100962304 = 10207^2 + 10048^2 .

It is a cyclic number.

It is not a de Polignac number, because 205145153 - 2⁸ = 205144897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (205145113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102572576 + 102572577.

It is an arithmetic number, because the mean of its divisors is an integer number (102572577).

Almost surely, 2^205145153 is an apocalyptic number.

It is an amenable number.

205145153 is a deficient number, since it is larger than the sum of its proper divisors (1).

205145153 is an equidigital number, since it uses as much as digits as its factorization.

205145153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 205145153 is about 14322.8891289432. The cubic root of 205145153 is about 589.7759879251.

Adding to 205145153 its reverse (351541502), we get a palindrome (556686655).

The spelling of 205145153 in words is "two hundred five million, one hundred forty-five thousand, one hundred fifty-three".