205757149 has 16 divisors (see below), whose sum is σ = 232952832. Its totient is φ = 180309888.

The previous prime is 205757141. The next prime is 205757173. The reversal of 205757149 is 941757502.

It is a cyclic number.

It is not a de Polignac number, because 205757149 - 2³ = 205757141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205757141) 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, 38452 + ... + 43474.

It is an arithmetic number, because the mean of its divisors is an integer number (14559552).

Almost surely, 2^205757149 is an apocalyptic number.

It is an amenable number.

205757149 is a deficient number, since it is larger than the sum of its proper divisors (27195683).

205757149 is a wasteful number, since it uses less digits than its factorization.

205757149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5196.

The product of its (nonzero) digits is 88200, while the sum is 40.

The square root of 205757149 is about 14344.2374840910. The cubic root of 205757149 is about 590.3618856184.

The spelling of 205757149 in words is "two hundred five million, seven hundred fifty-seven thousand, one hundred forty-nine".