165171572 has 6 divisors (see below), whose sum is σ = 289050258. Its totient is φ = 82585784.

The previous prime is 165171569. The next prime is 165171581. The reversal of 165171572 is 275171561.

It can be written as a sum of positive squares in only one way, i.e., 153908836 + 11262736 = 12406^2 + 3356^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20646443 + ... + 20646450.

It is an arithmetic number, because the mean of its divisors is an integer number (48175043).

Almost surely, 2^165171572 is an apocalyptic number.

It is an amenable number.

165171572 is a deficient number, since it is larger than the sum of its proper divisors (123878686).

165171572 is a wasteful number, since it uses less digits than its factorization.

165171572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41292897 (or 41292895 counting only the distinct ones).

The product of its digits is 14700, while the sum is 35.

The square root of 165171572 is about 12851.9092745008. The cubic root of 165171572 is about 548.6706983229.

The spelling of 165171572 in words is "one hundred sixty-five million, one hundred seventy-one thousand, five hundred seventy-two".