85157021 has 8 divisors (see below), whose sum is σ = 88452000. Its totient is φ = 81886000.

The previous prime is 85157011. The next prime is 85157027. The reversal of 85157021 is 12075158.

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 85157021 - 2¹⁴ = 85140637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85157027) 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 7 ways as a sum of consecutive naturals, for example, 1430 + ... + 13128.

It is an arithmetic number, because the mean of its divisors is an integer number (11056500).

Almost surely, 2^85157021 is an apocalyptic number.

It is an amenable number.

85157021 is a deficient number, since it is larger than the sum of its proper divisors (3294979).

85157021 is a wasteful number, since it uses less digits than its factorization.

85157021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11979.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 85157021 is about 9228.0561875186. The cubic root of 85157021 is about 439.9535436489.

The spelling of 85157021 in words is "eighty-five million, one hundred fifty-seven thousand, twenty-one".