165157441 has 2 divisors, whose sum is σ = 165157442. Its totient is φ = 165157440.

The previous prime is 165157417. The next prime is 165157451. The reversal of 165157441 is 144751561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157753600 + 7403841 = 12560^2 + 2721^2 .

It is a cyclic number.

It is not a de Polignac number, because 165157441 - 2⁵ = 165157409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165157397 and 165157406.

It is not a weakly prime, because it can be changed into another prime (165157451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82578720 + 82578721.

It is an arithmetic number, because the mean of its divisors is an integer number (82578721).

Almost surely, 2^165157441 is an apocalyptic number.

It is an amenable number.

165157441 is a deficient number, since it is larger than the sum of its proper divisors (1).

165157441 is an equidigital number, since it uses as much as digits as its factorization.

165157441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 34.

The square root of 165157441 is about 12851.3595000685. The cubic root of 165157441 is about 548.6550509839.

It can be divided in two parts, 16 and 5157441, that multiplied together give a square (82519056 = 9084²).

The spelling of 165157441 in words is "one hundred sixty-five million, one hundred fifty-seven thousand, four hundred forty-one".