85081005 has 24 divisors (see below), whose sum is σ = 156150072. Its totient is φ = 42706944.

The previous prime is 85081001. The next prime is 85081013. The reversal of 85081005 is 50018058.

It can be written as a sum of positive squares in 4 ways, for example, as 28965924 + 56115081 = 5382^2 + 7491^2 .

It is not a de Polignac number, because 85081005 - 2² = 85081001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85081005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85081001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54844 + ... + 56373.

It is an arithmetic number, because the mean of its divisors is an integer number (6506253).

Almost surely, 2^85081005 is an apocalyptic number.

85081005 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

85081005 is a deficient number, since it is larger than the sum of its proper divisors (71069067).

85081005 is a wasteful number, since it uses less digits than its factorization.

85081005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111245 (or 111242 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 85081005 is about 9223.9365240661. The cubic root of 85081005 is about 439.8225954925.

The spelling of 85081005 in words is "eighty-five million, eighty-one thousand, five".