31227197 has 2 divisors, whose sum is σ = 31227198. Its totient is φ = 31227196.

The previous prime is 31227193. The next prime is 31227233. The reversal of 31227197 is 79172213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26925721 + 4301476 = 5189^2 + 2074^2 .

It is a cyclic number.

It is not a de Polignac number, because 31227197 - 2² = 31227193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31227191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15613598 + 15613599.

It is an arithmetic number, because the mean of its divisors is an integer number (15613599).

Almost surely, 2^31227197 is an apocalyptic number.

It is an amenable number.

31227197 is a deficient number, since it is larger than the sum of its proper divisors (1).

31227197 is an equidigital number, since it uses as much as digits as its factorization.

31227197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292, while the sum is 32.

The square root of 31227197 is about 5588.1300092249. The cubic root of 31227197 is about 314.9036305522.

The spelling of 31227197 in words is "thirty-one million, two hundred twenty-seven thousand, one hundred ninety-seven".