85523557 has 8 divisors (see below), whose sum is σ = 99200576. Its totient is φ = 72211392.

The previous prime is 85523551. The next prime is 85523561. The reversal of 85523557 is 75532558.

It is a happy number.

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 85523557 - 2¹⁵ = 85490789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85523551) 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, 90708 + ... + 91645.

It is an arithmetic number, because the mean of its divisors is an integer number (12400072).

Almost surely, 2^85523557 is an apocalyptic number.

It is an amenable number.

85523557 is a deficient number, since it is larger than the sum of its proper divisors (13677019).

85523557 is a wasteful number, since it uses less digits than its factorization.

85523557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182427.

The product of its digits is 210000, while the sum is 40.

The square root of 85523557 is about 9247.8947333974. The cubic root of 85523557 is about 440.5838616054.

Subtracting from 85523557 its reverse (75532558), we obtain a palindrome (9990999).

The spelling of 85523557 in words is "eighty-five million, five hundred twenty-three thousand, five hundred fifty-seven".