205271587484551 has 8 divisors (see below), whose sum is σ = 234846469360160. Its totient is φ = 175759297953408.

The previous prime is 205271587484531. The next prime is 205271587484573. The reversal of 205271587484551 is 155484785172502.

It is a happy number.

205271587484551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205271587484551 - 2³¹ = 205269440000903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205271587484521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15648079086 + ... + 15648092203.

It is an arithmetic number, because the mean of its divisors is an integer number (29355808670020).

Almost surely, 2^{205271587484551} is an apocalyptic number.

205271587484551 is a deficient number, since it is larger than the sum of its proper divisors (29574881875609).

205271587484551 is an equidigital number, since it uses as much as digits as its factorization.

205271587484551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31296172233.

The product of its (nonzero) digits is 125440000, while the sum is 64.

The spelling of 205271587484551 in words is "two hundred five trillion, two hundred seventy-one billion, five hundred eighty-seven million, four hundred eighty-four thousand, five hundred fifty-one".