85512816 has 30 divisors (see below), whose sum is σ = 239317520. Its totient is φ = 28504224.

The previous prime is 85512811. The next prime is 85512821. The reversal of 85512816 is 61821558.

It is an interprime number because it is at equal distance from previous prime (85512811) and next prime (85512821).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85512811) 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 in 5 ways as a sum of consecutive naturals, for example, 296776 + ... + 297063.

Almost surely, 2^85512816 is an apocalyptic number.

It is an amenable number.

85512816 is an abundant number, since it is smaller than the sum of its proper divisors (153804704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85512816 is a wasteful number, since it uses less digits than its factorization.

85512816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593853 (or 593844 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 85512816 is about 9247.3139883968. The cubic root of 85512816 is about 440.5654163584.

The spelling of 85512816 in words is "eighty-five million, five hundred twelve thousand, eight hundred sixteen".