85581297 has 24 divisors (see below), whose sum is σ = 128593920. Its totient is φ = 54786240.

The previous prime is 85581289. The next prime is 85581317. The reversal of 85581297 is 79218558.

It is a happy number.

85581297 is a `hidden beast` number, since 8 + 558 + 1 + 2 + 97 = 666.

It is not a de Polignac number, because 85581297 - 2³ = 85581289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85581277) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37104 + ... + 39342.

It is an arithmetic number, because the mean of its divisors is an integer number (5358080).

Almost surely, 2^85581297 is an apocalyptic number.

It is an amenable number.

85581297 is a deficient number, since it is larger than the sum of its proper divisors (43012623).

85581297 is a wasteful number, since it uses less digits than its factorization.

85581297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2413 (or 2410 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 85581297 is about 9251.0159982566. The cubic root of 85581297 is about 440.6829905869.

The spelling of 85581297 in words is "eighty-five million, five hundred eighty-one thousand, two hundred ninety-seven".