97654322221 has 4 divisors (see below), whose sum is σ = 97662513600. Its totient is φ = 97646130844.

The previous prime is 97654322203. The next prime is 97654322243. The reversal of 97654322221 is 12222345679.

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 97654322221 - 2²⁵ = 97620767789 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97654322201) 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, 4077781 + ... + 4101658.

It is an arithmetic number, because the mean of its divisors is an integer number (24415628400).

Almost surely, 2^97654322221 is an apocalyptic number.

It is an amenable number.

97654322221 is a deficient number, since it is larger than the sum of its proper divisors (8191379).

97654322221 is a wasteful number, since it uses less digits than its factorization.

97654322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8191378.

The product of its digits is 362880, while the sum is 43.

The spelling of 97654322221 in words is "ninety-seven billion, six hundred fifty-four million, three hundred twenty-two thousand, two hundred twenty-one".