97100221 has 4 divisors (see below), whose sum is σ = 97535872. Its totient is φ = 96664572.

The previous prime is 97100191. The next prime is 97100233. The reversal of 97100221 is 12200179.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 97100221 - 2⁵ = 97100189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97100192 and 97100201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97100251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217491 + ... + 217936.

It is an arithmetic number, because the mean of its divisors is an integer number (24383968).

Almost surely, 2^97100221 is an apocalyptic number.

It is an amenable number.

97100221 is a deficient number, since it is larger than the sum of its proper divisors (435651).

97100221 is a wasteful number, since it uses less digits than its factorization.

97100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435650.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 97100221 is about 9853.9444386499. The cubic root of 97100221 is about 459.6282771990.

The spelling of 97100221 in words is "ninety-seven million, one hundred thousand, two hundred twenty-one".