84221553 has 16 divisors (see below), whose sum is σ = 128048256. Its totient is φ = 48779520.

The previous prime is 84221521. The next prime is 84221567. The reversal of 84221553 is 35512248.

It is not a de Polignac number, because 84221553 - 2⁵ = 84221521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84221553.

It is not an unprimeable number, because it can be changed into a prime (84221593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62853 + ... + 64178.

It is an arithmetic number, because the mean of its divisors is an integer number (8003016).

Almost surely, 2^84221553 is an apocalyptic number.

It is an amenable number.

84221553 is a deficient number, since it is larger than the sum of its proper divisors (43826703).

84221553 is a wasteful number, since it uses less digits than its factorization.

84221553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127064.

The product of its digits is 9600, while the sum is 30.

The square root of 84221553 is about 9177.2301376832. The cubic root of 84221553 is about 438.3366139049.

The spelling of 84221553 in words is "eighty-four million, two hundred twenty-one thousand, five hundred fifty-three".