205155315312234 has 48 divisors (see below), whose sum is σ = 481942654659648. Its totient is φ = 57031593429888.

The previous prime is 205155315312221. The next prime is 205155315312281. The reversal of 205155315312234 is 432213513551502.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1783963819 + ... + 1784078814.

It is an arithmetic number, because the mean of its divisors is an integer number (10040471972076).

Almost surely, 2^{205155315312234} is an apocalyptic number.

205155315312234 is an abundant number, since it is smaller than the sum of its proper divisors (276787339347414).

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

205155315312234 is a wasteful number, since it uses less digits than its factorization.

205155315312234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3568042719 (or 3568042682 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 42.

Adding to 205155315312234 its reverse (432213513551502), we get a palindrome (637368828863736).

The spelling of 205155315312234 in words is "two hundred five trillion, one hundred fifty-five billion, three hundred fifteen million, three hundred twelve thousand, two hundred thirty-four".