85275531 has 64 divisors (see below), whose sum is σ = 145152000. Its totient is φ = 49017600.

The previous prime is 85275529. The next prime is 85275539. The reversal of 85275531 is 13557258.

85275531 is a `hidden beast` number, since 8 + 52 + 75 + 531 = 666.

It is not a de Polignac number, because 85275531 - 2¹ = 85275529 is a prime.

It is a super-2 number, since 2×85275531² = 14543832374663922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85275539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 572245 + ... + 572393.

It is an arithmetic number, because the mean of its divisors is an integer number (2268000).

Almost surely, 2^85275531 is an apocalyptic number.

85275531 is a deficient number, since it is larger than the sum of its proper divisors (59876469).

85275531 is a wasteful number, since it uses less digits than its factorization.

85275531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 251 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 85275531 is about 9234.4751339749. The cubic root of 85275531 is about 440.1575382850.

The spelling of 85275531 in words is "eighty-five million, two hundred seventy-five thousand, five hundred thirty-one".