89521221 has 16 divisors (see below), whose sum is σ = 126599040. Its totient is φ = 56147520.

The previous prime is 89521219. The next prime is 89521247. The reversal of 89521221 is 12212598.

It is not a de Polignac number, because 89521221 - 2¹ = 89521219 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89521291) 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, 6426 + ... + 14843.

It is an arithmetic number, because the mean of its divisors is an integer number (7912440).

Almost surely, 2^89521221 is an apocalyptic number.

It is an amenable number.

89521221 is a deficient number, since it is larger than the sum of its proper divisors (37077819).

89521221 is a wasteful number, since it uses less digits than its factorization.

89521221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21356.

The product of its digits is 2880, while the sum is 30.

The square root of 89521221 is about 9461.5654624380. The cubic root of 89521221 is about 447.3443937412.

The spelling of 89521221 in words is "eighty-nine million, five hundred twenty-one thousand, two hundred twenty-one".