205431612 has 24 divisors (see below), whose sum is σ = 479740800. Its totient is φ = 68420016.

The previous prime is 205431601. The next prime is 205431619. The reversal of 205431612 is 216134502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205431619) 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, 9339 + ... + 22317.

It is an arithmetic number, because the mean of its divisors is an integer number (19989200).

Almost surely, 2^205431612 is an apocalyptic number.

It is an amenable number.

205431612 is an abundant number, since it is smaller than the sum of its proper divisors (274309188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205431612 is a wasteful number, since it uses less digits than its factorization.

205431612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14305 (or 14303 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 205431612 is about 14332.8856829321. The cubic root of 205431612 is about 590.0503758576.

It can be divided in two parts, 20543 and 1612, that added together give a triangular number (22155 = T₂₁₀).

The spelling of 205431612 in words is "two hundred five million, four hundred thirty-one thousand, six hundred twelve".