97255221 has 16 divisors (see below), whose sum is σ = 148796928. Its totient is φ = 55350000.

The previous prime is 97255217. The next prime is 97255253. The reversal of 97255221 is 12255279.

It is a happy number.

It is not a de Polignac number, because 97255221 - 2² = 97255217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97255211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3955 + ... + 14496.

It is an arithmetic number, because the mean of its divisors is an integer number (9299808).

Almost surely, 2^97255221 is an apocalyptic number.

It is an amenable number.

97255221 is a deficient number, since it is larger than the sum of its proper divisors (51541707).

97255221 is a wasteful number, since it uses less digits than its factorization.

97255221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18712.

The product of its digits is 12600, while the sum is 33.

The square root of 97255221 is about 9861.8061733133. The cubic root of 97255221 is about 459.8727136792.

The spelling of 97255221 in words is "ninety-seven million, two hundred fifty-five thousand, two hundred twenty-one".