31951441 has 2 divisors, whose sum is σ = 31951442. Its totient is φ = 31951440.

The previous prime is 31951379. The next prime is 31951453. The reversal of 31951441 is 14415913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23970816 + 7980625 = 4896^2 + 2825^2 .

It is a cyclic number.

It is not a de Polignac number, because 31951441 - 2²¹ = 29854289 is a prime.

It is not a weakly prime, because it can be changed into another prime (31951481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15975720 + 15975721.

It is an arithmetic number, because the mean of its divisors is an integer number (15975721).

Almost surely, 2^31951441 is an apocalyptic number.

It is an amenable number.

31951441 is a deficient number, since it is larger than the sum of its proper divisors (1).

31951441 is an equidigital number, since it uses as much as digits as its factorization.

31951441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 31951441 is about 5652.5605702195. The cubic root of 31951441 is about 317.3195403296.

The spelling of 31951441 in words is "thirty-one million, nine hundred fifty-one thousand, four hundred forty-one".