85224447 has 32 divisors (see below), whose sum is σ = 157416960. Its totient is φ = 44271360.

The previous prime is 85224413. The next prime is 85224457. The reversal of 85224447 is 74442258.

It is not a de Polignac number, because 85224447 - 2⁷ = 85224319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85224457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18418 + ... + 22575.

It is an arithmetic number, because the mean of its divisors is an integer number (4919280).

Almost surely, 2^85224447 is an apocalyptic number.

85224447 is a deficient number, since it is larger than the sum of its proper divisors (72192513).

85224447 is a wasteful number, since it uses less digits than its factorization.

85224447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41020 (or 41014 counting only the distinct ones).

The product of its digits is 71680, while the sum is 36.

The square root of 85224447 is about 9231.7087800688. The cubic root of 85224447 is about 440.0696291323.

The spelling of 85224447 in words is "eighty-five million, two hundred twenty-four thousand, four hundred forty-seven".