85555273 has 2 divisors, whose sum is σ = 85555274. Its totient is φ = 85555272.

The previous prime is 85555229. The next prime is 85555289. The reversal of 85555273 is 37255558.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84143929 + 1411344 = 9173^2 + 1188^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85555273 is a prime.

It is not a weakly prime, because it can be changed into another prime (85555573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42777636 + 42777637.

It is an arithmetic number, because the mean of its divisors is an integer number (42777637).

Almost surely, 2^85555273 is an apocalyptic number.

It is an amenable number.

85555273 is a deficient number, since it is larger than the sum of its proper divisors (1).

85555273 is an equidigital number, since it uses as much as digits as its factorization.

85555273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 210000, while the sum is 40.

The square root of 85555273 is about 9249.6093431020. The cubic root of 85555273 is about 440.6383176767.

It can be divided in two parts, 855552 and 73, that added together give a square (855625 = 925²).

The spelling of 85555273 in words is "eighty-five million, five hundred fifty-five thousand, two hundred seventy-three".