205136155 has 8 divisors (see below), whose sum is σ = 281329632. Its totient is φ = 140664768.

The previous prime is 205136143. The next prime is 205136167. The reversal of 205136155 is 551631502.

It is an interprime number because it is at equal distance from previous prime (205136143) and next prime (205136167).

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

It is a cyclic number.

It is not a de Polignac number, because 205136155 - 2⁵ = 205136123 is a prime.

It is a Duffinian 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, 2930482 + ... + 2930551.

It is an arithmetic number, because the mean of its divisors is an integer number (35166204).

Almost surely, 2^205136155 is an apocalyptic number.

205136155 is a deficient number, since it is larger than the sum of its proper divisors (76193477).

205136155 is an equidigital number, since it uses as much as digits as its factorization.

205136155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5861045.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 205136155 is about 14322.5750128949. The cubic root of 205136155 is about 589.7673649544.

Adding to 205136155 its reverse (551631502), we get a palindrome (756767657).

The spelling of 205136155 in words is "two hundred five million, one hundred thirty-six thousand, one hundred fifty-five".