205142153 has 2 divisors, whose sum is σ = 205142154. Its totient is φ = 205142152.

The previous prime is 205142149. The next prime is 205142227. The reversal of 205142153 is 351241502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174583369 + 30558784 = 13213^2 + 5528^2 .

It is a cyclic number.

It is not a de Polignac number, because 205142153 - 2² = 205142149 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (205142123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102571076 + 102571077.

It is an arithmetic number, because the mean of its divisors is an integer number (102571077).

Almost surely, 2^205142153 is an apocalyptic number.

It is an amenable number.

205142153 is a deficient number, since it is larger than the sum of its proper divisors (1).

205142153 is an equidigital number, since it uses as much as digits as its factorization.

205142153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 205142153 is about 14322.7844010863. The cubic root of 205142153 is about 589.7731129906.

Adding to 205142153 its reverse (351241502), we get a palindrome (556383655).

The spelling of 205142153 in words is "two hundred five million, one hundred forty-two thousand, one hundred fifty-three".