205342244542531 has 2 divisors, whose sum is σ = 205342244542532. Its totient is φ = 205342244542530.

The previous prime is 205342244542499. The next prime is 205342244542579. The reversal of 205342244542531 is 135245442243502.

205342244542531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205342244542531 - 2⁵ = 205342244542499 is a prime.

It is a super-2 number, since 2×205342244542531² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (205342244542031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102671122271265 + 102671122271266.

It is an arithmetic number, because the mean of its divisors is an integer number (102671122271266).

Almost surely, 2^{205342244542531} is an apocalyptic number.

205342244542531 is a deficient number, since it is larger than the sum of its proper divisors (1).

205342244542531 is an equidigital number, since it uses as much as digits as its factorization.

205342244542531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608000, while the sum is 46.

The spelling of 205342244542531 in words is "two hundred five trillion, three hundred forty-two billion, two hundred forty-four million, five hundred forty-two thousand, five hundred thirty-one".