165563071 has 2 divisors, whose sum is σ = 165563072. Its totient is φ = 165563070.

The previous prime is 165563023. The next prime is 165563129. The reversal of 165563071 is 170365561.

It is a weak prime.

It is an emirp because it is prime and its reverse (170365561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165563071 - 2²³ = 157174463 is a prime.

It is a super-2 number, since 2×165563071² = 54822260957902082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165563011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82781535 + 82781536.

It is an arithmetic number, because the mean of its divisors is an integer number (82781536).

Almost surely, 2^165563071 is an apocalyptic number.

165563071 is a deficient number, since it is larger than the sum of its proper divisors (1).

165563071 is an equidigital number, since it uses as much as digits as its factorization.

165563071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 165563071 is about 12867.1314207946. The cubic root of 165563071 is about 549.1038530454.

The spelling of 165563071 in words is "one hundred sixty-five million, five hundred sixty-three thousand, seventy-one".