205139158 has 8 divisors (see below), whose sum is σ = 351667152. Its totient is φ = 87916776.

The previous prime is 205139107. The next prime is 205139159. The reversal of 205139158 is 851931502.

205139158 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205139159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7326385 + ... + 7326412.

It is an arithmetic number, because the mean of its divisors is an integer number (43958394).

Almost surely, 2^205139158 is an apocalyptic number.

205139158 is a deficient number, since it is larger than the sum of its proper divisors (146527994).

205139158 is a wasteful number, since it uses less digits than its factorization.

205139158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14652806.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 205139158 is about 14322.6798470119. The cubic root of 205139158 is about 589.7702428198.

It can be divided in two parts, 2051 and 39158, that added together give a square (41209 = 203²).

The spelling of 205139158 in words is "two hundred five million, one hundred thirty-nine thousand, one hundred fifty-eight".