85581365 has 4 divisors (see below), whose sum is σ = 102697644. Its totient is φ = 68465088.

The previous prime is 85581323. The next prime is 85581401. The reversal of 85581365 is 56318558.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64915249 + 20666116 = 8057^2 + 4546^2 .

It is a cyclic number.

It is not a de Polignac number, because 85581365 - 2¹⁴ = 85564981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8558132 + ... + 8558141.

It is an arithmetic number, because the mean of its divisors is an integer number (25674411).

Almost surely, 2^85581365 is an apocalyptic number.

It is an amenable number.

85581365 is a deficient number, since it is larger than the sum of its proper divisors (17116279).

85581365 is a wasteful number, since it uses less digits than its factorization.

85581365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17116278.

The product of its digits is 144000, while the sum is 41.

The square root of 85581365 is about 9251.0196735279. The cubic root of 85581365 is about 440.6831073042.

The spelling of 85581365 in words is "eighty-five million, five hundred eighty-one thousand, three hundred sixty-five".