85454572221 has 24 divisors (see below), whose sum is σ = 126786767744. Its totient is φ = 55422856800.

The previous prime is 85454572199. The next prime is 85454572243. The reversal of 85454572221 is 12227545458.

85454572221 is a `hidden beast` number, since 8 + 5 + 4 + 54 + 572 + 2 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (85454572199) and next prime (85454572243).

It is not a de Polignac number, because 85454572221 - 2²² = 85450377917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85454572261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4147896 + ... + 4168446.

Almost surely, 2^85454572221 is an apocalyptic number.

It is an amenable number.

85454572221 is a deficient number, since it is larger than the sum of its proper divisors (41332195523).

85454572221 is a wasteful number, since it uses less digits than its factorization.

85454572221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33081 (or 33078 counting only the distinct ones).

The product of its digits is 896000, while the sum is 45.

The spelling of 85454572221 in words is "eighty-five billion, four hundred fifty-four million, five hundred seventy-two thousand, two hundred twenty-one".