85522719 has 4 divisors (see below), whose sum is σ = 114030296. Its totient is φ = 57015144.

The previous prime is 85522709. The next prime is 85522727. The reversal of 85522719 is 91722558.

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

It is not a de Polignac number, because 85522719 - 2⁵ = 85522687 is a prime.

It is a super-2 number, since 2×85522719² = 14628270930305922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85522709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14253784 + ... + 14253789.

It is an arithmetic number, because the mean of its divisors is an integer number (28507574).

Almost surely, 2^85522719 is an apocalyptic number.

85522719 is a deficient number, since it is larger than the sum of its proper divisors (28507577).

85522719 is a wasteful number, since it uses less digits than its factorization.

85522719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28507576.

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

The square root of 85522719 is about 9247.8494256773. The cubic root of 85522719 is about 440.5824225848.

The spelling of 85522719 in words is "eighty-five million, five hundred twenty-two thousand, seven hundred nineteen".