31534961 has 2 divisors, whose sum is σ = 31534962. Its totient is φ = 31534960.

The previous prime is 31534913. The next prime is 31534981. The reversal of 31534961 is 16943513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26584336 + 4950625 = 5156^2 + 2225^2 .

It is an emirp because it is prime and its reverse (16943513) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31534961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31534981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15767480 + 15767481.

It is an arithmetic number, because the mean of its divisors is an integer number (15767481).

Almost surely, 2^31534961 is an apocalyptic number.

It is an amenable number.

31534961 is a deficient number, since it is larger than the sum of its proper divisors (1).

31534961 is an equidigital number, since it uses as much as digits as its factorization.

31534961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 32.

The square root of 31534961 is about 5615.5997898711. The cubic root of 31534961 is about 315.9347759685.

The spelling of 31534961 in words is "thirty-one million, five hundred thirty-four thousand, nine hundred sixty-one".