205179131 has 2 divisors, whose sum is σ = 205179132. Its totient is φ = 205179130.

The previous prime is 205179127. The next prime is 205179181. The reversal of 205179131 is 131971502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205179131 - 2² = 205179127 is a prime.

It is a super-2 number, since 2×205179131² = 84196951595830322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 205179094 and 205179103.

It is not a weakly prime, because it can be changed into another prime (205179181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102589565 + 102589566.

It is an arithmetic number, because the mean of its divisors is an integer number (102589566).

Almost surely, 2^205179131 is an apocalyptic number.

205179131 is a deficient number, since it is larger than the sum of its proper divisors (1).

205179131 is an equidigital number, since it uses as much as digits as its factorization.

205179131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 205179131 is about 14324.0752232038. The cubic root of 205179131 is about 589.8085474761.

The spelling of 205179131 in words is "two hundred five million, one hundred seventy-nine thousand, one hundred thirty-one".