165533941 has 2 divisors, whose sum is σ = 165533942. Its totient is φ = 165533940.

The previous prime is 165533939. The next prime is 165533969. The reversal of 165533941 is 149335561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154504900 + 11029041 = 12430^2 + 3321^2 .

It is a cyclic number.

It is not a de Polignac number, because 165533941 - 2¹ = 165533939 is a prime.

Together with 165533939, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 165533941.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165533141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82766970 + 82766971.

It is an arithmetic number, because the mean of its divisors is an integer number (82766971).

Almost surely, 2^165533941 is an apocalyptic number.

It is an amenable number.

165533941 is a deficient number, since it is larger than the sum of its proper divisors (1).

165533941 is an equidigital number, since it uses as much as digits as its factorization.

165533941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 37.

The square root of 165533941 is about 12865.9994170682. Note that the first 3 decimals coincide. The cubic root of 165533941 is about 549.0716471247.

The spelling of 165533941 in words is "one hundred sixty-five million, five hundred thirty-three thousand, nine hundred forty-one".