85517580 has 24 divisors (see below), whose sum is σ = 239449392. Its totient is φ = 22804672.

The previous prime is 85517569. The next prime is 85517591. The reversal of 85517580 is 8571558.

It is an interprime number because it is at equal distance from previous prime (85517569) and next prime (85517591).

It is an unprimeable number.

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, 712587 + ... + 712706.

It is an arithmetic number, because the mean of its divisors is an integer number (9977058).

Almost surely, 2^85517580 is an apocalyptic number.

It is an amenable number.

85517580 is an abundant number, since it is smaller than the sum of its proper divisors (153931812).

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

85517580 is a wasteful number, since it uses less digits than its factorization.

85517580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425305 (or 1425303 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 39.

The square root of 85517580 is about 9247.5715731212. The cubic root of 85517580 is about 440.5735976454.

The spelling of 85517580 in words is "eighty-five million, five hundred seventeen thousand, five hundred eighty".