205036631 has 4 divisors (see below), whose sum is σ = 205159152. Its totient is φ = 204914112.

The previous prime is 205036621. The next prime is 205036639. The reversal of 205036631 is 136630502.

205036631 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 205036631 - 2⁶ = 205036567 is a prime.

It is a super-2 number, since 2×205036631² = 84080040103660322, 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 205036631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205036639) 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, 58715 + ... + 62108.

It is an arithmetic number, because the mean of its divisors is an integer number (51289788).

Almost surely, 2^205036631 is an apocalyptic number.

205036631 is a deficient number, since it is larger than the sum of its proper divisors (122521).

205036631 is a wasteful number, since it uses less digits than its factorization.

205036631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122520.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 205036631 is about 14319.1002161449. The cubic root of 205036631 is about 589.6719722104.

The spelling of 205036631 in words is "two hundred five million, thirty-six thousand, six hundred thirty-one".