97221155 has 8 divisors (see below), whose sum is σ = 116720784. Its totient is φ = 77740000.

The previous prime is 97221143. The next prime is 97221191. The reversal of 97221155 is 55112279.

It is a happy number.

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

It is not a de Polignac number, because 97221155 - 2⁴ = 97221139 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13265 + ... + 19245.

It is an arithmetic number, because the mean of its divisors is an integer number (14590098).

Almost surely, 2^97221155 is an apocalyptic number.

97221155 is a deficient number, since it is larger than the sum of its proper divisors (19499629).

97221155 is a wasteful number, since it uses less digits than its factorization.

97221155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9237.

The product of its digits is 6300, while the sum is 32.

The square root of 97221155 is about 9860.0788536401. The cubic root of 97221155 is about 459.8190135515.

The spelling of 97221155 in words is "ninety-seven million, two hundred twenty-one thousand, one hundred fifty-five".