85238081 has 2 divisors, whose sum is σ = 85238082. Its totient is φ = 85238080.

The previous prime is 85238053. The next prime is 85238089. The reversal of 85238081 is 18083258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71250481 + 13987600 = 8441^2 + 3740^2 .

It is a cyclic number.

It is not a de Polignac number, because 85238081 - 2²⁶ = 18129217 is a prime.

It is a super-2 number, since 2×85238081² = 14531060905125122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85238089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42619040 + 42619041.

It is an arithmetic number, because the mean of its divisors is an integer number (42619041).

Almost surely, 2^85238081 is an apocalyptic number.

It is an amenable number.

85238081 is a deficient number, since it is larger than the sum of its proper divisors (1).

85238081 is an equidigital number, since it uses as much as digits as its factorization.

85238081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 85238081 is about 9232.4471837103. The cubic root of 85238081 is about 440.0930949710.

The spelling of 85238081 in words is "eighty-five million, two hundred thirty-eight thousand, eighty-one".