165232051 has 4 divisors (see below), whose sum is σ = 165258072. Its totient is φ = 165206032.

The previous prime is 165232049. The next prime is 165232057. The reversal of 165232051 is 150232561.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 150232561 = 1553 ⋅96737.

It is a cyclic number.

It is not a de Polignac number, because 165232051 - 2¹ = 165232049 is a prime.

It is a super-3 number, since 3×165232051³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165232057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3495 + ... + 18511.

It is an arithmetic number, because the mean of its divisors is an integer number (41314518).

Almost surely, 2^165232051 is an apocalyptic number.

165232051 is a deficient number, since it is larger than the sum of its proper divisors (26021).

165232051 is a wasteful number, since it uses less digits than its factorization.

165232051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26020.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 165232051 is about 12854.2619780367. The cubic root of 165232051 is about 548.7376569920.

The spelling of 165232051 in words is "one hundred sixty-five million, two hundred thirty-two thousand, fifty-one".