85571901 has 12 divisors (see below), whose sum is σ = 123731712. Its totient is φ = 56988936.

The previous prime is 85571887. The next prime is 85571909. The reversal of 85571901 is 10917558.

85571901 is a `hidden beast` number, since 85 + 571 + 9 + 0 + 1 = 666.

It is not a de Polignac number, because 85571901 - 2¹⁷ = 85440829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85571909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5410 + ... + 14156.

It is an arithmetic number, because the mean of its divisors is an integer number (10310976).

Almost surely, 2^85571901 is an apocalyptic number.

It is an amenable number.

85571901 is a deficient number, since it is larger than the sum of its proper divisors (38159811).

85571901 is a wasteful number, since it uses less digits than its factorization.

85571901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9840 (or 9837 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The square root of 85571901 is about 9250.5081482046. The cubic root of 85571901 is about 440.6668624177. Note that the first 3 decimals are identical.

The spelling of 85571901 in words is "eighty-five million, five hundred seventy-one thousand, nine hundred one".