165183156 has 18 divisors (see below), whose sum is σ = 417546402. Its totient is φ = 55061040.

The previous prime is 165183127. The next prime is 165183157. The reversal of 165183156 is 651381561.

It can be written as a sum of positive squares in only one way, i.e., 128459556 + 36723600 = 11334^2 + 6060^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×165183156³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4588421 = 165183156 / (1 + 6 + 5 + 1 + 8 + 3 + 1 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 165183156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165183157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2294175 + ... + 2294246.

Almost surely, 2^165183156 is an apocalyptic number.

It is an amenable number.

165183156 is an abundant number, since it is smaller than the sum of its proper divisors (252363246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165183156 is a wasteful number, since it uses less digits than its factorization.

165183156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4588431 (or 4588426 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 165183156 is about 12852.3599389373. The cubic root of 165183156 is about 548.6835246883.

The spelling of 165183156 in words is "one hundred sixty-five million, one hundred eighty-three thousand, one hundred fifty-six".