165215056 has 20 divisors (see below), whose sum is σ = 323407252. Its totient is φ = 81755136.

The previous prime is 165215053. The next prime is 165215077. The reversal of 165215056 is 650512561.

It can be written as a sum of positive squares in 2 ways, for example, as 105678400 + 59536656 = 10280^2 + 7716^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165215053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51675 + ... + 54778.

Almost surely, 2^165215056 is an apocalyptic number.

165215056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165215056 is a deficient number, since it is larger than the sum of its proper divisors (158192196).

165215056 is a wasteful number, since it uses less digits than its factorization.

165215056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106558 (or 106552 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 165215056 is about 12853.6008962469. The cubic root of 165215056 is about 548.7188428129.

The spelling of 165215056 in words is "one hundred sixty-five million, two hundred fifteen thousand, fifty-six".