85215637 has 8 divisors (see below), whose sum is σ = 93905504. Its totient is φ = 76830768.

The previous prime is 85215629. The next prime is 85215643. The reversal of 85215637 is 73651258.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85215637 - 2³ = 85215629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85215596 and 85215605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85215617) 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 7 ways as a sum of consecutive naturals, for example, 75663 + ... + 76780.

It is an arithmetic number, because the mean of its divisors is an integer number (11738188).

Almost surely, 2^85215637 is an apocalyptic number.

It is an amenable number.

85215637 is a deficient number, since it is larger than the sum of its proper divisors (8689867).

85215637 is a wasteful number, since it uses less digits than its factorization.

85215637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152499.

The product of its digits is 50400, while the sum is 37.

The square root of 85215637 is about 9231.2316079708. The cubic root of 85215637 is about 440.0544646766.

The spelling of 85215637 in words is "eighty-five million, two hundred fifteen thousand, six hundred thirty-seven".