165257071 has 8 divisors (see below), whose sum is σ = 188956800. Its totient is φ = 141580248.

The previous prime is 165256979. The next prime is 165257077. The reversal of 165257071 is 170752561.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165257071 - 2¹⁵ = 165224303 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 (165257077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14520 + ... + 23266.

It is an arithmetic number, because the mean of its divisors is an integer number (23619600).

Almost surely, 2^165257071 is an apocalyptic number.

165257071 is a deficient number, since it is larger than the sum of its proper divisors (23699729).

165257071 is an equidigital number, since it uses as much as digits as its factorization.

165257071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11453.

The product of its (nonzero) digits is 14700, while the sum is 34.

The square root of 165257071 is about 12855.2351592649. The cubic root of 165257071 is about 548.7653528359.

The spelling of 165257071 in words is "one hundred sixty-five million, two hundred fifty-seven thousand, seventy-one".