205031430 has 96 divisors (see below), whose sum is σ = 571506624. Its totient is φ = 50865408.

The previous prime is 205031423. The next prime is 205031483. The reversal of 205031430 is 34130502.

205031430 is a `hidden beast` number, since 20 + 503 + 143 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75252 + ... + 77928.

It is an arithmetic number, because the mean of its divisors is an integer number (5953194).

Almost surely, 2^205031430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205031430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285753312).

205031430 is an abundant number, since it is smaller than the sum of its proper divisors (366475194).

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

205031430 is a wasteful number, since it uses less digits than its factorization.

205031430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2750 (or 2747 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 205031430 is about 14318.9186044198. The cubic root of 205031430 is about 589.6669862561. Note that the first 3 decimals are identical.

Adding to 205031430 its reverse (34130502), we get a palindrome (239161932).

The spelling of 205031430 in words is "two hundred five million, thirty-one thousand, four hundred thirty".