165550253 has 4 divisors (see below), whose sum is σ = 180600288. Its totient is φ = 150500220.

The previous prime is 165550243. The next prime is 165550271. The reversal of 165550253 is 352055561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165550253 - 2⁴ = 165550237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165550243) 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, 7525001 + ... + 7525022.

It is an arithmetic number, because the mean of its divisors is an integer number (45150072).

Almost surely, 2^165550253 is an apocalyptic number.

It is an amenable number.

165550253 is a deficient number, since it is larger than the sum of its proper divisors (15050035).

165550253 is a wasteful number, since it uses less digits than its factorization.

165550253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15050034.

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 165550253 is about 12866.6333203368. The cubic root of 165550253 is about 549.0896820213.

The spelling of 165550253 in words is "one hundred sixty-five million, five hundred fifty thousand, two hundred fifty-three".