85065553 has 6 divisors (see below), whose sum is σ = 87428166. Its totient is φ = 82765152.

The previous prime is 85065521. The next prime is 85065593. The reversal of 85065553 is 35556058.

It can be written as a sum of positive squares in 3 ways, for example, as 62853184 + 22212369 = 7928^2 + 4713^2 .

It is not a de Polignac number, because 85065553 - 2⁵ = 85065521 is a prime.

It is a super-2 number, since 2×85065553² = 14472296614391618, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85065503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29700 + ... + 32437.

It is an arithmetic number, because the mean of its divisors is an integer number (14571361).

Almost surely, 2^85065553 is an apocalyptic number.

It is an amenable number.

85065553 is a deficient number, since it is larger than the sum of its proper divisors (2362613).

85065553 is an equidigital number, since it uses as much as digits as its factorization.

85065553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62211 (or 62174 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

The square root of 85065553 is about 9223.0988826966. The cubic root of 85065553 is about 439.7959677307.

The spelling of 85065553 in words is "eighty-five million, sixty-five thousand, five hundred fifty-three".