84233521 has 16 divisors (see below), whose sum is σ = 93598848. Its totient is φ = 75398400.

The previous prime is 84233519. The next prime is 84233537. The reversal of 84233521 is 12533248.

It is not a de Polignac number, because 84233521 - 2¹ = 84233519 is a prime.

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 84233521.

It is not an unprimeable number, because it can be changed into a prime (84233551) 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, 81991 + ... + 83011.

It is an arithmetic number, because the mean of its divisors is an integer number (5849928).

Almost surely, 2^84233521 is an apocalyptic number.

It is an amenable number.

84233521 is a deficient number, since it is larger than the sum of its proper divisors (9365327).

84233521 is a wasteful number, since it uses less digits than its factorization.

84233521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272.

The product of its digits is 5760, while the sum is 28.

The square root of 84233521 is about 9177.8821631137. The cubic root of 84233521 is about 438.3573756694.

Adding to 84233521 its reverse (12533248), we get a palindrome (96766769).

The spelling of 84233521 in words is "eighty-four million, two hundred thirty-three thousand, five hundred twenty-one".