85569143 has 18 divisors (see below), whose sum is σ = 99954288. Its totient is φ = 73184320.

The previous prime is 85569089. The next prime is 85569149. The reversal of 85569143 is 34196558.

It is not a de Polignac number, because 85569143 - 2⁶ = 85569079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85569143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85569149) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 33746 + ... + 36192.

It is an arithmetic number, because the mean of its divisors is an integer number (5553016).

Almost surely, 2^85569143 is an apocalyptic number.

85569143 is a deficient number, since it is larger than the sum of its proper divisors (14385145).

85569143 is a wasteful number, since it uses less digits than its factorization.

85569143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503 (or 2475 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The square root of 85569143 is about 9250.3590741117. The cubic root of 85569143 is about 440.6621281056.

The spelling of 85569143 in words is "eighty-five million, five hundred sixty-nine thousand, one hundred forty-three".