85531123 has 4 divisors (see below), whose sum is σ = 85847008. Its totient is φ = 85215240.

The previous prime is 85531109. The next prime is 85531151. The reversal of 85531123 is 32113558.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85531123 - 2⁵ = 85531091 is a prime.

It is a super-2 number, since 2×85531123² = 14631146003282258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85531091 and 85531100.

It is not an unprimeable number, because it can be changed into a prime (85531223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157536 + ... + 158077.

It is an arithmetic number, because the mean of its divisors is an integer number (21461752).

Almost surely, 2^85531123 is an apocalyptic number.

85531123 is a deficient number, since it is larger than the sum of its proper divisors (315885).

85531123 is a wasteful number, since it uses less digits than its factorization.

85531123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315884.

The product of its digits is 3600, while the sum is 28.

The square root of 85531123 is about 9248.3037904256. The cubic root of 85531123 is about 440.5968535782.

The spelling of 85531123 in words is "eighty-five million, five hundred thirty-one thousand, one hundred twenty-three".