205135453431487 has 2 divisors, whose sum is σ = 205135453431488. Its totient is φ = 205135453431486.

The previous prime is 205135453431437. The next prime is 205135453431527. The reversal of 205135453431487 is 784134354531502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205135453431487 - 2¹⁹ = 205135452907199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205135453431437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102567726715743 + 102567726715744.

It is an arithmetic number, because the mean of its divisors is an integer number (102567726715744).

Almost surely, 2^{205135453431487} is an apocalyptic number.

205135453431487 is a deficient number, since it is larger than the sum of its proper divisors (1).

205135453431487 is an equidigital number, since it uses as much as digits as its factorization.

205135453431487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192000, while the sum is 55.

The spelling of 205135453431487 in words is "two hundred five trillion, one hundred thirty-five billion, four hundred fifty-three million, four hundred thirty-one thousand, four hundred eighty-seven".