205242162143 has 2 divisors, whose sum is σ = 205242162144. Its totient is φ = 205242162142.

The previous prime is 205242162127. The next prime is 205242162157. The reversal of 205242162143 is 341261242502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205242162143 - 2⁴ = 205242162127 is a prime.

It is a super-2 number, since 2×205242162143² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205242162193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102621081071 + 102621081072.

It is an arithmetic number, because the mean of its divisors is an integer number (102621081072).

Almost surely, 2^205242162143 is an apocalyptic number.

205242162143 is a deficient number, since it is larger than the sum of its proper divisors (1).

205242162143 is an equidigital number, since it uses as much as digits as its factorization.

205242162143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 205242162143 in words is "two hundred five billion, two hundred forty-two million, one hundred sixty-two thousand, one hundred forty-three".