85130505 has 12 divisors (see below), whose sum is σ = 147559620. Its totient is φ = 45402912.

The previous prime is 85130503. The next prime is 85130531. The reversal of 85130505 is 50503158.

It can be written as a sum of positive squares in 2 ways, for example, as 15023376 + 70107129 = 3876^2 + 8373^2 .

It is not a de Polignac number, because 85130505 - 2¹ = 85130503 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85130503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 945850 + ... + 945939.

It is an arithmetic number, because the mean of its divisors is an integer number (12296635).

Almost surely, 2^85130505 is an apocalyptic number.

It is an amenable number.

85130505 is a deficient number, since it is larger than the sum of its proper divisors (62429115).

85130505 is a wasteful number, since it uses less digits than its factorization.

85130505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891800 (or 1891797 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 85130505 is about 9226.6193700618. The cubic root of 85130505 is about 439.9078749964.

The spelling of 85130505 in words is "eighty-five million, one hundred thirty thousand, five hundred five".