205351123254 has 16 divisors (see below), whose sum is σ = 410808609792. Its totient is φ = 68432647208.

The previous prime is 205351123249. The next prime is 205351123279. The reversal of 205351123254 is 452321153502.

205351123254 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 4406694 + ... + 4453049.

It is an arithmetic number, because the mean of its divisors is an integer number (25675538112).

Almost surely, 2^205351123254 is an apocalyptic number.

205351123254 is an abundant number, since it is smaller than the sum of its proper divisors (205457486538).

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

205351123254 is a wasteful number, since it uses less digits than its factorization.

205351123254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8863611.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 205351123254 its reverse (452321153502), we get a palindrome (657672276756).

The spelling of 205351123254 in words is "two hundred five billion, three hundred fifty-one million, one hundred twenty-three thousand, two hundred fifty-four".