205151504255 has 16 divisors (see below), whose sum is σ = 247856109600. Its totient is φ = 163008599040.

The previous prime is 205151504219. The next prime is 205151504279. The reversal of 205151504255 is 552405151502.

It is a de Polignac number, because none of the positive numbers 2^k-205151504255 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232091 + ... + 681299.

It is an arithmetic number, because the mean of its divisors is an integer number (15491006850).

Almost surely, 2^205151504255 is an apocalyptic number.

205151504255 is a deficient number, since it is larger than the sum of its proper divisors (42704605345).

205151504255 is a wasteful number, since it uses less digits than its factorization.

205151504255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449834.

The product of its (nonzero) digits is 50000, while the sum is 35.

Adding to 205151504255 its reverse (552405151502), we get a palindrome (757556655757).

The spelling of 205151504255 in words is "two hundred five billion, one hundred fifty-one million, five hundred four thousand, two hundred fifty-five".