205138701 has 6 divisors (see below), whose sum is σ = 296311470. Its totient is φ = 136759128.

The previous prime is 205138699. The next prime is 205138709. The reversal of 205138701 is 107831502.

It can be written as a sum of positive squares in only one way, i.e., 169676676 + 35462025 = 13026^2 + 5955^2 .

It is not a de Polignac number, because 205138701 - 2¹ = 205138699 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205138709) 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 5 ways as a sum of consecutive naturals, for example, 11396586 + ... + 11396603.

It is an arithmetic number, because the mean of its divisors is an integer number (49385245).

Almost surely, 2^205138701 is an apocalyptic number.

It is an amenable number.

205138701 is a deficient number, since it is larger than the sum of its proper divisors (91172769).

205138701 is a wasteful number, since it uses less digits than its factorization.

205138701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22793195 (or 22793192 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 205138701 is about 14322.6638932847. The cubic root of 205138701 is about 589.7698048647.

The spelling of 205138701 in words is "two hundred five million, one hundred thirty-eight thousand, seven hundred one".