205230631 has 4 divisors (see below), whose sum is σ = 205407064. Its totient is φ = 205054200.

The previous prime is 205230611. The next prime is 205230643. The reversal of 205230631 is 136032502.

205230631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205230631 - 2⁹ = 205230119 is a prime.

It is a super-2 number, since 2×205230631² = 84239223801316322, 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 (205230611) 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, 86460 + ... + 88801.

It is an arithmetic number, because the mean of its divisors is an integer number (51351766).

Almost surely, 2^205230631 is an apocalyptic number.

205230631 is a deficient number, since it is larger than the sum of its proper divisors (176433).

205230631 is a wasteful number, since it uses less digits than its factorization.

205230631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176432.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 205230631 is about 14325.8727831850. The cubic root of 205230631 is about 589.8578906996.

The spelling of 205230631 in words is "two hundred five million, two hundred thirty thousand, six hundred thirty-one".