205139157 has 16 divisors (see below), whose sum is σ = 279505920. Its totient is φ = 133790400.

The previous prime is 205139107. The next prime is 205139159. The reversal of 205139157 is 751931502.

205139157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 205139157 - 2¹¹ = 205137109 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 32019 + ... + 37887.

It is an arithmetic number, because the mean of its divisors is an integer number (17469120).

Almost surely, 2^205139157 is an apocalyptic number.

It is an amenable number.

205139157 is a deficient number, since it is larger than the sum of its proper divisors (74366763).

205139157 is a wasteful number, since it uses less digits than its factorization.

205139157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6124.

The product of its (nonzero) digits is 9450, while the sum is 33.

The square root of 205139157 is about 14322.6798121022. The cubic root of 205139157 is about 589.7702418615.

The spelling of 205139157 in words is "two hundred five million, one hundred thirty-nine thousand, one hundred fifty-seven".