97031221 has 6 divisors (see below), whose sum is σ = 112873110. Its totient is φ = 83169576.

The previous prime is 97031191. The next prime is 97031239. The reversal of 97031221 is 12213079.

It can be written as a sum of positive squares in only one way, i.e., 92910321 + 4120900 = 9639^2 + 2030^2 .

It is not a de Polignac number, because 97031221 - 2¹⁵ = 96998453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97031261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 990066 + ... + 990163.

It is an arithmetic number, because the mean of its divisors is an integer number (18812185).

Almost surely, 2^97031221 is an apocalyptic number.

It is an amenable number.

97031221 is a deficient number, since it is larger than the sum of its proper divisors (15841889).

97031221 is a wasteful number, since it uses less digits than its factorization.

97031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980243 (or 1980236 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 97031221 is about 9850.4426804078. The cubic root of 97031221 is about 459.5193798628.

The spelling of 97031221 in words is "ninety-seven million, thirty-one thousand, two hundred twenty-one".