205143454 has 16 divisors (see below), whose sum is σ = 333395568. Its totient is φ = 94292352.

The previous prime is 205143401. The next prime is 205143469. The reversal of 205143454 is 454341502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68697 + ... + 71620.

It is an arithmetic number, because the mean of its divisors is an integer number (20837223).

Almost surely, 2^205143454 is an apocalyptic number.

205143454 is a deficient number, since it is larger than the sum of its proper divisors (128252114).

205143454 is a wasteful number, since it uses less digits than its factorization.

205143454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140379.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 205143454 is about 14322.8298181609. The cubic root of 205143454 is about 589.7743597573.

Adding to 205143454 its reverse (454341502), we get a palindrome (659484956).

The spelling of 205143454 in words is "two hundred five million, one hundred forty-three thousand, four hundred fifty-four".