205240330153 has 2 divisors, whose sum is σ = 205240330154. Its totient is φ = 205240330152.

The previous prime is 205240330147. The next prime is 205240330201. The reversal of 205240330153 is 351033042502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186617088064 + 18623242089 = 431992^2 + 136467^2 .

It is a cyclic number.

It is not a de Polignac number, because 205240330153 - 2⁵ = 205240330121 is a prime.

It is not a weakly prime, because it can be changed into another prime (205240330133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102620165076 + 102620165077.

It is an arithmetic number, because the mean of its divisors is an integer number (102620165077).

Almost surely, 2^205240330153 is an apocalyptic number.

It is an amenable number.

205240330153 is a deficient number, since it is larger than the sum of its proper divisors (1).

205240330153 is an equidigital number, since it uses as much as digits as its factorization.

205240330153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 28.

Adding to 205240330153 its reverse (351033042502), we get a palindrome (556273372655).

The spelling of 205240330153 in words is "two hundred five billion, two hundred forty million, three hundred thirty thousand, one hundred fifty-three".