205133024155 has 4 divisors (see below), whose sum is σ = 246159628992. Its totient is φ = 164106419320.

The previous prime is 205133024113. The next prime is 205133024209. The reversal of 205133024155 is 551420331502.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 205133024155 - 2²¹ = 205130927003 is a prime.

It is a Duffinian 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, 20513302411 + ... + 20513302420.

It is an arithmetic number, because the mean of its divisors is an integer number (61539907248).

Almost surely, 2^205133024155 is an apocalyptic number.

205133024155 is a deficient number, since it is larger than the sum of its proper divisors (41026604837).

205133024155 is an equidigital number, since it uses as much as digits as its factorization.

205133024155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41026604836.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 205133024155 its reverse (551420331502), we get a palindrome (756553355657).

The spelling of 205133024155 in words is "two hundred five billion, one hundred thirty-three million, twenty-four thousand, one hundred fifty-five".