84224421 has 16 divisors (see below), whose sum is σ = 126067200. Its totient is φ = 55569024.

The previous prime is 84224419. The next prime is 84224431. The reversal of 84224421 is 12442248.

It is not a de Polignac number, because 84224421 - 2¹ = 84224419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84224431) 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 15 ways as a sum of consecutive naturals, for example, 13461 + ... + 18698.

It is an arithmetic number, because the mean of its divisors is an integer number (7879200).

Almost surely, 2^84224421 is an apocalyptic number.

It is an amenable number.

84224421 is a deficient number, since it is larger than the sum of its proper divisors (41842779).

84224421 is a wasteful number, since it uses less digits than its factorization.

84224421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32265 (or 32259 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

The square root of 84224421 is about 9177.3863926501. The cubic root of 84224421 is about 438.3415894134.

Adding to 84224421 its reverse (12442248), we get a palindrome (96666669).

The spelling of 84224421 in words is "eighty-four million, two hundred twenty-four thousand, four hundred twenty-one".