205449153 has 32 divisors (see below), whose sum is σ = 341246976. Its totient is φ = 107051328.

The previous prime is 205449149. The next prime is 205449157. The reversal of 205449153 is 351944502.

It is an interprime number because it is at equal distance from previous prime (205449149) and next prime (205449157).

It is not a de Polignac number, because 205449153 - 2² = 205449149 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205449157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18126 + ... + 27192.

It is an arithmetic number, because the mean of its divisors is an integer number (10663968).

Almost surely, 2^205449153 is an apocalyptic number.

It is an amenable number.

205449153 is a deficient number, since it is larger than the sum of its proper divisors (135797823).

205449153 is a wasteful number, since it uses less digits than its factorization.

205449153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9173.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 205449153 is about 14333.4975843302. The cubic root of 205449153 is about 590.0671694091.

The spelling of 205449153 in words is "two hundred five million, four hundred forty-nine thousand, one hundred fifty-three".