165212441 has 4 divisors (see below), whose sum is σ = 166674612. Its totient is φ = 163750272.

The previous prime is 165212417. The next prime is 165212447. The reversal of 165212441 is 144212561.

165212441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18705625 + 146506816 = 4325^2 + 12104^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165212441 is a prime.

It is a super-2 number, since 2×165212441² = 54590301322356962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 165212441.

It is not an unprimeable number, because it can be changed into a prime (165212447) 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, 730916 + ... + 731141.

It is an arithmetic number, because the mean of its divisors is an integer number (41668653).

Almost surely, 2^165212441 is an apocalyptic number.

It is an amenable number.

165212441 is a deficient number, since it is larger than the sum of its proper divisors (1462171).

165212441 is a wasteful number, since it uses less digits than its factorization.

165212441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462170.

The product of its digits is 1920, while the sum is 26.

The square root of 165212441 is about 12853.4991733769. The cubic root of 165212441 is about 548.7159477834.

The spelling of 165212441 in words is "one hundred sixty-five million, two hundred twelve thousand, four hundred forty-one".