205671431027 has 2 divisors, whose sum is σ = 205671431028. Its totient is φ = 205671431026.

The previous prime is 205671430957. The next prime is 205671431033. The reversal of 205671431027 is 720134176502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205671431027 - 2²⁰ = 205670382451 is a prime.

It is not a weakly prime, because it can be changed into another prime (205671431527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102835715513 + 102835715514.

It is an arithmetic number, because the mean of its divisors is an integer number (102835715514).

Almost surely, 2^205671431027 is an apocalyptic number.

205671431027 is a deficient number, since it is larger than the sum of its proper divisors (1).

205671431027 is an equidigital number, since it uses as much as digits as its factorization.

205671431027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 38.

The spelling of 205671431027 in words is "two hundred five billion, six hundred seventy-one million, four hundred thirty-one thousand, twenty-seven".