205342154543 has 2 divisors, whose sum is σ = 205342154544. Its totient is φ = 205342154542.

The previous prime is 205342154519. The next prime is 205342154587. The reversal of 205342154543 is 345451243502.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205342154543 is a prime.

It is a super-2 number, since 2×205342154543² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205342154497 and 205342154506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205342153543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102671077271 + 102671077272.

It is an arithmetic number, because the mean of its divisors is an integer number (102671077272).

Almost surely, 2^205342154543 is an apocalyptic number.

205342154543 is a deficient number, since it is larger than the sum of its proper divisors (1).

205342154543 is an equidigital number, since it uses as much as digits as its factorization.

205342154543 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 205342154543 in words is "two hundred five billion, three hundred forty-two million, one hundred fifty-four thousand, five hundred forty-three".