31548961 has 2 divisors, whose sum is σ = 31548962. Its totient is φ = 31548960.

The previous prime is 31548953. The next prime is 31548983. The reversal of 31548961 is 16984513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31528225 + 20736 = 5615^2 + 144^2 .

It is a cyclic number.

It is not a de Polignac number, because 31548961 - 2³ = 31548953 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31548961.

It is not a weakly prime, because it can be changed into another prime (31540961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15774480 + 15774481.

It is an arithmetic number, because the mean of its divisors is an integer number (15774481).

Almost surely, 2^31548961 is an apocalyptic number.

It is an amenable number.

31548961 is a deficient number, since it is larger than the sum of its proper divisors (1).

31548961 is an equidigital number, since it uses as much as digits as its factorization.

31548961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 37.

The square root of 31548961 is about 5616.8461791294. The cubic root of 31548961 is about 315.9815223132.

The spelling of 31548961 in words is "thirty-one million, five hundred forty-eight thousand, nine hundred sixty-one".