165213041 has 4 divisors (see below), whose sum is σ = 188814912. Its totient is φ = 141611172.

The previous prime is 165213017. The next prime is 165213047. The reversal of 165213041 is 140312561.

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, and also an emirpimes, since its reverse is a distinct semiprime: 140312561 = 59 ⋅2378179.

It is a cyclic number.

It is not a de Polignac number, because 165213041 - 2⁶ = 165212977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165212998 and 165213016.

It is not an unprimeable number, because it can be changed into a prime (165213047) 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, 11800925 + ... + 11800938.

It is an arithmetic number, because the mean of its divisors is an integer number (47203728).

Almost surely, 2^165213041 is an apocalyptic number.

It is an amenable number.

165213041 is a deficient number, since it is larger than the sum of its proper divisors (23601871).

165213041 is an equidigital number, since it uses as much as digits as its factorization.

165213041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23601870.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 165213041 is about 12853.5225133035. The cubic root of 165213041 is about 548.7166120376.

The spelling of 165213041 in words is "one hundred sixty-five million, two hundred thirteen thousand, forty-one".