205671431001 has 4 divisors (see below), whose sum is σ = 274228574672. Its totient is φ = 137114287332.

The previous prime is 205671430957. The next prime is 205671431027. The reversal of 205671431001 is 100134176502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 205671431001 - 2⁷ = 205671430873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205671431001.

It is not an unprimeable number, because it can be changed into a prime (205671431071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34278571831 + ... + 34278571836.

It is an arithmetic number, because the mean of its divisors is an integer number (68557143668).

Almost surely, 2^205671431001 is an apocalyptic number.

It is an amenable number.

205671431001 is a deficient number, since it is larger than the sum of its proper divisors (68557143671).

205671431001 is an equidigital number, since it uses as much as digits as its factorization.

205671431001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68557143670.

The product of its (nonzero) digits is 5040, while the sum is 30.

The spelling of 205671431001 in words is "two hundred five billion, six hundred seventy-one million, four hundred thirty-one thousand, one".