85231555 has 16 divisors (see below), whose sum is σ = 105871104. Its totient is φ = 65802240.

The previous prime is 85231483. The next prime is 85231561. The reversal of 85231555 is 55513258.

It is not a de Polignac number, because 85231555 - 2⁹ = 85231043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85231555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88959 + ... + 89911.

It is an arithmetic number, because the mean of its divisors is an integer number (6616944).

Almost surely, 2^85231555 is an apocalyptic number.

85231555 is a deficient number, since it is larger than the sum of its proper divisors (20639549).

85231555 is a wasteful number, since it uses less digits than its factorization.

85231555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566.

The product of its digits is 30000, while the sum is 34.

The square root of 85231555 is about 9232.0937495240. The cubic root of 85231555 is about 440.0818632117.

The spelling of 85231555 in words is "eighty-five million, two hundred thirty-one thousand, five hundred fifty-five".