165505433 has 2 divisors, whose sum is σ = 165505434. Its totient is φ = 165505432.

The previous prime is 165505423. The next prime is 165505451. The reversal of 165505433 is 334505561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137288089 + 28217344 = 11717^2 + 5312^2 .

It is a cyclic number.

It is not a de Polignac number, because 165505433 - 2¹² = 165501337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165505433.

It is not a weakly prime, because it can be changed into another prime (165505423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82752716 + 82752717.

It is an arithmetic number, because the mean of its divisors is an integer number (82752717).

Almost surely, 2^165505433 is an apocalyptic number.

It is an amenable number.

165505433 is a deficient number, since it is larger than the sum of its proper divisors (1).

165505433 is an equidigital number, since it uses as much as digits as its factorization.

165505433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 165505433 is about 12864.8914880772. The cubic root of 165505433 is about 549.0401252243.

The spelling of 165505433 in words is "one hundred sixty-five million, five hundred five thousand, four hundred thirty-three".