165123256 has 32 divisors (see below), whose sum is σ = 326125440. Its totient is φ = 78224608.

The previous prime is 165123253. The next prime is 165123263. The reversal of 165123256 is 652321561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165123253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15495 + ... + 23881.

It is an arithmetic number, because the mean of its divisors is an integer number (10191420).

Almost surely, 2^165123256 is an apocalyptic number.

It is an amenable number.

165123256 is a deficient number, since it is larger than the sum of its proper divisors (161002184).

165123256 is a wasteful number, since it uses less digits than its factorization.

165123256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8523 (or 8519 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 165123256 is about 12850.0294163087. The cubic root of 165123256 is about 548.6171940417.

The spelling of 165123256 in words is "one hundred sixty-five million, one hundred twenty-three thousand, two hundred fifty-six".