85155945 has 32 divisors (see below), whose sum is σ = 156156672. Its totient is φ = 38817792.

The previous prime is 85155937. The next prime is 85155947. The reversal of 85155945 is 54955158.

It is a happy number.

It is not a de Polignac number, because 85155945 - 2³ = 85155937 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 85155897 and 85155906.

It is not an unprimeable number, because it can be changed into a prime (85155947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44529 + ... + 46401.

It is an arithmetic number, because the mean of its divisors is an integer number (4879896).

Almost surely, 2^85155945 is an apocalyptic number.

It is an amenable number.

85155945 is a deficient number, since it is larger than the sum of its proper divisors (71000727).

85155945 is a wasteful number, since it uses less digits than its factorization.

85155945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321.

The product of its digits is 180000, while the sum is 42.

The square root of 85155945 is about 9227.9978868658. The cubic root of 85155945 is about 439.9516906328.

The spelling of 85155945 in words is "eighty-five million, one hundred fifty-five thousand, nine hundred forty-five".