85221657471 has 8 divisors (see below), whose sum is σ = 114523592704. Its totient is φ = 56367080280.

The previous prime is 85221657449. The next prime is 85221657481. The reversal of 85221657471 is 17475612258.

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

It is not a de Polignac number, because 85221657471 - 2⁵ = 85221657439 is a prime.

It is a super-3 number, since 3×85221657471³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85221657471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85221657481) 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, 111839065 + ... + 111839826.

It is an arithmetic number, because the mean of its divisors is an integer number (14315449088).

Almost surely, 2^85221657471 is an apocalyptic number.

85221657471 is a deficient number, since it is larger than the sum of its proper divisors (29301935233).

85221657471 is a wasteful number, since it uses less digits than its factorization.

85221657471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223679021.

The product of its digits is 940800, while the sum is 48.

The spelling of 85221657471 in words is "eighty-five billion, two hundred twenty-one million, six hundred fifty-seven thousand, four hundred seventy-one".