85155641 has 2 divisors, whose sum is σ = 85155642. Its totient is φ = 85155640.

The previous prime is 85155619. The next prime is 85155671. The reversal of 85155641 is 14655158.

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., 77510416 + 7645225 = 8804^2 + 2765^2 .

It is a cyclic number.

It is not a de Polignac number, because 85155641 - 2¹⁰ = 85154617 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (85155671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42577820 + 42577821.

It is an arithmetic number, because the mean of its divisors is an integer number (42577821).

Almost surely, 2^85155641 is an apocalyptic number.

It is an amenable number.

85155641 is a deficient number, since it is larger than the sum of its proper divisors (1).

85155641 is an equidigital number, since it uses as much as digits as its factorization.

85155641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24000, while the sum is 35.

The square root of 85155641 is about 9227.9814152392. The cubic root of 85155641 is about 439.9511671012.

The spelling of 85155641 in words is "eighty-five million, one hundred fifty-five thousand, six hundred forty-one".