31422241 has 2 divisors, whose sum is σ = 31422242. Its totient is φ = 31422240.

The previous prime is 31422233. The next prime is 31422289. The reversal of 31422241 is 14222413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23804641 + 7617600 = 4879^2 + 2760^2 .

It is a cyclic number.

It is not a de Polignac number, because 31422241 - 2³ = 31422233 is a prime.

It is not a weakly prime, because it can be changed into another prime (31422641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711120 + 15711121.

It is an arithmetic number, because the mean of its divisors is an integer number (15711121).

Almost surely, 2^31422241 is an apocalyptic number.

It is an amenable number.

31422241 is a deficient number, since it is larger than the sum of its proper divisors (1).

31422241 is an equidigital number, since it uses as much as digits as its factorization.

31422241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 19.

The square root of 31422241 is about 5605.5544774804. The cubic root of 31422241 is about 315.5578960176.

Adding to 31422241 its reverse (14222413), we get a palindrome (45644654).

The spelling of 31422241 in words is "thirty-one million, four hundred twenty-two thousand, two hundred forty-one".