205450153 has 2 divisors, whose sum is σ = 205450154. Its totient is φ = 205450152.

The previous prime is 205450111. The next prime is 205450163. The reversal of 205450153 is 351054502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160452889 + 44997264 = 12667^2 + 6708^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205450153 is a prime.

It is not a weakly prime, because it can be changed into another prime (205450163) 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, 102725076 + 102725077.

It is an arithmetic number, because the mean of its divisors is an integer number (102725077).

Almost surely, 2^205450153 is an apocalyptic number.

It is an amenable number.

205450153 is a deficient number, since it is larger than the sum of its proper divisors (1).

205450153 is an equidigital number, since it uses as much as digits as its factorization.

205450153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 205450153 is about 14333.5324676090. The cubic root of 205450153 is about 590.0681267688.

The spelling of 205450153 in words is "two hundred five million, four hundred fifty thousand, one hundred fifty-three".