97288221 has 16 divisors (see below), whose sum is σ = 132652224. Its totient is φ = 63406464.

The previous prime is 97288181. The next prime is 97288249. The reversal of 97288221 is 12288279.

It is not a de Polignac number, because 97288221 - 2⁶ = 97288157 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 97288221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97288291) 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, 25771 + ... + 29303.

It is an arithmetic number, because the mean of its divisors is an integer number (8290764).

Almost surely, 2^97288221 is an apocalyptic number.

It is an amenable number.

97288221 is a deficient number, since it is larger than the sum of its proper divisors (35364003).

97288221 is a wasteful number, since it uses less digits than its factorization.

97288221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3740.

The product of its digits is 32256, while the sum is 39.

The square root of 97288221 is about 9863.4791529156. The cubic root of 97288221 is about 459.9247214558.

The spelling of 97288221 in words is "ninety-seven million, two hundred eighty-eight thousand, two hundred twenty-one".