205465631 has 8 divisors (see below), whose sum is σ = 234921984. Its totient is φ = 176035320.

The previous prime is 205465627. The next prime is 205465643. The reversal of 205465631 is 136564502.

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 205465631 - 2² = 205465627 is a prime.

It is a super-2 number, since 2×205465631² = 84432251044456322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205465651) 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, 15266 + ... + 25376.

It is an arithmetic number, because the mean of its divisors is an integer number (29365248).

Almost surely, 2^205465631 is an apocalyptic number.

205465631 is a deficient number, since it is larger than the sum of its proper divisors (29456353).

205465631 is a wasteful number, since it uses less digits than its factorization.

205465631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13021.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 205465631 is about 14334.0723801717. The cubic root of 205465631 is about 590.0829443859.

The spelling of 205465631 in words is "two hundred five million, four hundred sixty-five thousand, six hundred thirty-one".