85505287 has 8 divisors (see below), whose sum is σ = 98688672. Its totient is φ = 72564000.

The previous prime is 85505279. The next prime is 85505293. The reversal of 85505287 is 78250558.

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 85505287 - 2³ = 85505279 is a prime.

It is a super-2 number, since 2×85505287² = 14622308209904738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85505207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59764 + ... + 61177.

It is an arithmetic number, because the mean of its divisors is an integer number (12336084).

Almost surely, 2^85505287 is an apocalyptic number.

85505287 is a deficient number, since it is larger than the sum of its proper divisors (13183385).

85505287 is a wasteful number, since it uses less digits than its factorization.

85505287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121049.

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 85505287 is about 9246.9068882519. The cubic root of 85505287 is about 440.5524860768.

The spelling of 85505287 in words is "eighty-five million, five hundred five thousand, two hundred eighty-seven".