97221818 has 8 divisors (see below), whose sum is σ = 146166240. Its totient is φ = 48499740.

The previous prime is 97221809. The next prime is 97221821. The reversal of 97221818 is 81812279.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54488 + ... + 56243.

It is an arithmetic number, because the mean of its divisors is an integer number (18270780).

Almost surely, 2^97221818 is an apocalyptic number.

97221818 is a deficient number, since it is larger than the sum of its proper divisors (48944422).

97221818 is a wasteful number, since it uses less digits than its factorization.

97221818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111172.

The product of its digits is 16128, while the sum is 38.

The square root of 97221818 is about 9860.1124740035. The cubic root of 97221818 is about 459.8200587949.

The spelling of 97221818 in words is "ninety-seven million, two hundred twenty-one thousand, eight hundred eighteen".