205575157 has 2 divisors, whose sum is σ = 205575158. Its totient is φ = 205575156.

The previous prime is 205575121. The next prime is 205575179. The reversal of 205575157 is 751575502.

It is a happy number.

205575157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142229476 + 63345681 = 11926^2 + 7959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205575157 is a prime.

It is a super-2 number, since 2×205575157² = 84522290351149298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205575187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102787578 + 102787579.

It is an arithmetic number, because the mean of its divisors is an integer number (102787579).

Almost surely, 2^205575157 is an apocalyptic number.

It is an amenable number.

205575157 is a deficient number, since it is larger than the sum of its proper divisors (1).

205575157 is an equidigital number, since it uses as much as digits as its factorization.

205575157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61250, while the sum is 37.

The square root of 205575157 is about 14337.8923485985. The cubic root of 205575157 is about 590.1877761021.

The spelling of 205575157 in words is "two hundred five million, five hundred seventy-five thousand, one hundred fifty-seven".