205156071 has 10 divisors (see below), whose sum is σ = 306467832. Its totient is φ = 136770660.

The previous prime is 205156069. The next prime is 205156073. The reversal of 205156071 is 170651502.

205156071 is a `hidden beast` number, since 2 + 0 + 51 + 5 + 607 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (205156069) and next prime (205156073).

It is not a de Polignac number, because 205156071 - 2¹ = 205156069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205156073) 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 9 ways as a sum of consecutive naturals, for example, 1266315 + ... + 1266476.

Almost surely, 2^205156071 is an apocalyptic number.

205156071 is a deficient number, since it is larger than the sum of its proper divisors (101311761).

205156071 is an equidigital number, since it uses as much as digits as its factorization.

205156071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532803 (or 2532794 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 205156071 is about 14323.2702620596. The cubic root of 205156071 is about 589.7864505331.

The spelling of 205156071 in words is "two hundred five million, one hundred fifty-six thousand, seventy-one".