205342154453 has 2 divisors, whose sum is σ = 205342154454. Its totient is φ = 205342154452.

The previous prime is 205342154429. The next prime is 205342154519. The reversal of 205342154453 is 354451243502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145990475569 + 59351678884 = 382087^2 + 243622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205342154453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205342154653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102671077226 + 102671077227.

It is an arithmetic number, because the mean of its divisors is an integer number (102671077227).

Almost surely, 2^205342154453 is an apocalyptic number.

It is an amenable number.

205342154453 is a deficient number, since it is larger than the sum of its proper divisors (1).

205342154453 is an equidigital number, since it uses as much as digits as its factorization.

205342154453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288000, while the sum is 38.

Adding to 205342154453 its reverse (354451243502), we get a palindrome (559793397955).

The spelling of 205342154453 in words is "two hundred five billion, three hundred forty-two million, one hundred fifty-four thousand, four hundred fifty-three".