31125841 has 2 divisors, whose sum is σ = 31125842. Its totient is φ = 31125840.

The previous prime is 31125833. The next prime is 31125869. The reversal of 31125841 is 14852113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19395216 + 11730625 = 4404^2 + 3425^2 .

It is a cyclic number.

It is not a de Polignac number, because 31125841 - 2³ = 31125833 is a prime.

It is not a weakly prime, because it can be changed into another prime (31125811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15562920 + 15562921.

It is an arithmetic number, because the mean of its divisors is an integer number (15562921).

Almost surely, 2^31125841 is an apocalyptic number.

It is an amenable number.

31125841 is a deficient number, since it is larger than the sum of its proper divisors (1).

31125841 is an equidigital number, since it uses as much as digits as its factorization.

31125841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 25.

The square root of 31125841 is about 5579.0537728185. The cubic root of 31125841 is about 314.5625606953.

Adding to 31125841 its reverse (14852113), we get a palindrome (45977954).

The spelling of 31125841 in words is "thirty-one million, one hundred twenty-five thousand, eight hundred forty-one".