205311390743 has 2 divisors, whose sum is σ = 205311390744. Its totient is φ = 205311390742.

The previous prime is 205311390737. The next prime is 205311390773. The reversal of 205311390743 is 347093113502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205311390743 - 2¹⁰ = 205311389719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205311390697 and 205311390706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205311390703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102655695371 + 102655695372.

It is an arithmetic number, because the mean of its divisors is an integer number (102655695372).

Almost surely, 2^205311390743 is an apocalyptic number.

205311390743 is a deficient number, since it is larger than the sum of its proper divisors (1).

205311390743 is an equidigital number, since it uses as much as digits as its factorization.

205311390743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 38.

The spelling of 205311390743 in words is "two hundred five billion, three hundred eleven million, three hundred ninety thousand, seven hundred forty-three".