85115512 has 8 divisors (see below), whose sum is σ = 159591600. Its totient is φ = 42557752.

The previous prime is 85115477. The next prime is 85115519. The reversal of 85115512 is 21551158.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85115519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5319712 + ... + 5319727.

It is an arithmetic number, because the mean of its divisors is an integer number (19948950).

Almost surely, 2^85115512 is an apocalyptic number.

It is an amenable number.

85115512 is a deficient number, since it is larger than the sum of its proper divisors (74476088).

85115512 is a wasteful number, since it uses less digits than its factorization.

85115512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10639445 (or 10639441 counting only the distinct ones).

The product of its digits is 2000, while the sum is 28.

The square root of 85115512 is about 9225.8068481841. The cubic root of 85115512 is about 439.8820482731.

The spelling of 85115512 in words is "eighty-five million, one hundred fifteen thousand, five hundred twelve".