205951047 has 8 divisors (see below), whose sum is σ = 274838640. Its totient is φ = 137182080.

The previous prime is 205951043. The next prime is 205951063. The reversal of 205951047 is 740159502.

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

It is not a de Polignac number, because 205951047 - 2² = 205951043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205950999 and 205951017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205951043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25522 + ... + 32607.

It is an arithmetic number, because the mean of its divisors is an integer number (34354830).

Almost surely, 2^205951047 is an apocalyptic number.

205951047 is a deficient number, since it is larger than the sum of its proper divisors (68887593).

205951047 is a wasteful number, since it uses less digits than its factorization.

205951047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59313.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 205951047 is about 14350.9946345192. The cubic root of 205951047 is about 590.5472725350.

The spelling of 205951047 in words is "two hundred five million, nine hundred fifty-one thousand, forty-seven".