205536155 has 32 divisors (see below), whose sum is σ = 274752000. Its totient is φ = 146361600.

The previous prime is 205536151. The next prime is 205536181. The reversal of 205536155 is 551635502.

It is not a de Polignac number, because 205536155 - 2² = 205536151 is a prime.

It is a super-2 number, since 2×205536155² = 84490222024368050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205536151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 974000 + ... + 974210.

It is an arithmetic number, because the mean of its divisors is an integer number (8586000).

Almost surely, 2^205536155 is an apocalyptic number.

205536155 is a deficient number, since it is larger than the sum of its proper divisors (69215845).

205536155 is a wasteful number, since it uses less digits than its factorization.

205536155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515.

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 205536155 is about 14336.5321818074. The cubic root of 205536155 is about 590.1504499974.

The spelling of 205536155 in words is "two hundred five million, five hundred thirty-six thousand, one hundred fifty-five".