205151504254 has 8 divisors (see below), whose sum is σ = 312771965688. Its totient is φ = 100894182360.

The previous prime is 205151504219. The next prime is 205151504279. The reversal of 205151504254 is 452405151502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840784732 + ... + 840784975.

It is an arithmetic number, because the mean of its divisors is an integer number (39096495711).

Almost surely, 2^205151504254 is an apocalyptic number.

205151504254 is a deficient number, since it is larger than the sum of its proper divisors (107620461434).

205151504254 is a wasteful number, since it uses less digits than its factorization.

205151504254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681569770.

The product of its (nonzero) digits is 40000, while the sum is 34.

Adding to 205151504254 its reverse (452405151502), we get a palindrome (657556655756).

The spelling of 205151504254 in words is "two hundred five billion, one hundred fifty-one million, five hundred four thousand, two hundred fifty-four".