205143555151391 has 2 divisors, whose sum is σ = 205143555151392. Its totient is φ = 205143555151390.

The previous prime is 205143555151387. The next prime is 205143555151427. The reversal of 205143555151391 is 193151555341502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205143555151391 - 2² = 205143555151387 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205143555151321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102571777575695 + 102571777575696.

It is an arithmetic number, because the mean of its divisors is an integer number (102571777575696).

Almost surely, 2^{205143555151391} is an apocalyptic number.

205143555151391 is a deficient number, since it is larger than the sum of its proper divisors (1).

205143555151391 is an equidigital number, since it uses as much as digits as its factorization.

205143555151391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2025000, while the sum is 50.

The spelling of 205143555151391 in words is "two hundred five trillion, one hundred forty-three billion, five hundred fifty-five million, one hundred fifty-one thousand, three hundred ninety-one".