205704631 has 8 divisors (see below), whose sum is σ = 224513424. Its totient is φ = 186913920.

The previous prime is 205704619. The next prime is 205704637. The reversal of 205704631 is 136407502.

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 205704631 - 2⁹ = 205704119 is a prime.

It is a super-2 number, since 2×205704631² = 84628790429692322, which contains 22 as substring.

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 205704631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205704637) 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, 32481 + ... + 38293.

It is an arithmetic number, because the mean of its divisors is an integer number (28064178).

Almost surely, 2^205704631 is an apocalyptic number.

205704631 is a deficient number, since it is larger than the sum of its proper divisors (18808793).

205704631 is a wasteful number, since it uses less digits than its factorization.

205704631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9041.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 205704631 is about 14342.4067366673. The cubic root of 205704631 is about 590.3116528335.

The spelling of 205704631 in words is "two hundred five million, seven hundred four thousand, six hundred thirty-one".