205453430 has 64 divisors (see below), whose sum is σ = 469905408. Its totient is φ = 62916480.

The previous prime is 205453427. The next prime is 205453459. The reversal of 205453430 is 34354502.

205453430 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×205453430² = 84422223797529800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 205453430.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24569 + ... + 31851.

It is an arithmetic number, because the mean of its divisors is an integer number (7342272).

Almost surely, 2^205453430 is an apocalyptic number.

205453430 is an abundant number, since it is smaller than the sum of its proper divisors (264451978).

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

205453430 is a wasteful number, since it uses less digits than its factorization.

205453430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7341.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 205453430 is about 14333.6467795185. The cubic root of 205453430 is about 590.0712640147.

The spelling of 205453430 in words is "two hundred five million, four hundred fifty-three thousand, four hundred thirty".