85722159 has 4 divisors (see below), whose sum is σ = 114296216. Its totient is φ = 57148104.

The previous prime is 85722149. The next prime is 85722179. The reversal of 85722159 is 95122758.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 85722159 - 2⁸ = 85721903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85722149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14287024 + ... + 14287029.

It is an arithmetic number, because the mean of its divisors is an integer number (28574054).

Almost surely, 2^85722159 is an apocalyptic number.

85722159 is a deficient number, since it is larger than the sum of its proper divisors (28574057).

85722159 is a wasteful number, since it uses less digits than its factorization.

85722159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28574056.

The product of its digits is 50400, while the sum is 39.

The square root of 85722159 is about 9258.6261939880. The cubic root of 85722159 is about 440.9246378592.

It can be divided in two parts, 8572 and 2159, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 85722159 in words is "eighty-five million, seven hundred twenty-two thousand, one hundred fifty-nine".