85143471 has 8 divisors (see below), whose sum is σ = 129742464. Its totient is φ = 48653400.

The previous prime is 85143469. The next prime is 85143491. The reversal of 85143471 is 17434158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85143471 - 2¹ = 85143469 is a prime.

It is a super-3 number, since 3×85143471³ (a number of 25 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85143451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2027205 + ... + 2027246.

It is an arithmetic number, because the mean of its divisors is an integer number (16217808).

Almost surely, 2^85143471 is an apocalyptic number.

85143471 is a deficient number, since it is larger than the sum of its proper divisors (44598993).

85143471 is a wasteful number, since it uses less digits than its factorization.

85143471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054461.

The product of its digits is 13440, while the sum is 33.

The square root of 85143471 is about 9227.3219841945. The cubic root of 85143471 is about 439.9302075941.

The spelling of 85143471 in words is "eighty-five million, one hundred forty-three thousand, four hundred seventy-one".