85170155 has 8 divisors (see below), whose sum is σ = 116804832. Its totient is φ = 58402368.

The previous prime is 85170139. The next prime is 85170193. The reversal of 85170155 is 55107158.

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 85170155 - 2⁴ = 85170139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1216682 + ... + 1216751.

It is an arithmetic number, because the mean of its divisors is an integer number (14600604).

Almost surely, 2^85170155 is an apocalyptic number.

85170155 is a deficient number, since it is larger than the sum of its proper divisors (31634677).

85170155 is a wasteful number, since it uses less digits than its factorization.

85170155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433445.

The product of its (nonzero) digits is 7000, while the sum is 32.

The square root of 85170155 is about 9228.7677942399. The cubic root of 85170155 is about 439.9761608985.

The spelling of 85170155 in words is "eighty-five million, one hundred seventy thousand, one hundred fifty-five".