205777151 has 4 divisors (see below), whose sum is σ = 207279312. Its totient is φ = 204274992.

The previous prime is 205777141. The next prime is 205777189. The reversal of 205777151 is 151777502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205777151 - 2¹⁰ = 205776127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205777141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750875 + ... + 751148.

It is an arithmetic number, because the mean of its divisors is an integer number (51819828).

Almost surely, 2^205777151 is an apocalyptic number.

205777151 is a deficient number, since it is larger than the sum of its proper divisors (1502161).

205777151 is a wasteful number, since it uses less digits than its factorization.

205777151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502160.

The product of its (nonzero) digits is 17150, while the sum is 35.

The square root of 205777151 is about 14344.9346809248. The cubic root of 205777151 is about 590.3810150239.

The spelling of 205777151 in words is "two hundred five million, seven hundred seventy-seven thousand, one hundred fifty-one".