31248473 has 2 divisors, whose sum is σ = 31248474. Its totient is φ = 31248472.

The previous prime is 31248443. The next prime is 31248479. The reversal of 31248473 is 37484213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15976009 + 15272464 = 3997^2 + 3908^2 .

It is a cyclic number.

It is not a de Polignac number, because 31248473 - 2¹⁰ = 31247449 is a prime.

It is not a weakly prime, because it can be changed into another prime (31248479) 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, 15624236 + 15624237.

It is an arithmetic number, because the mean of its divisors is an integer number (15624237).

Almost surely, 2^31248473 is an apocalyptic number.

It is an amenable number.

31248473 is a deficient number, since it is larger than the sum of its proper divisors (1).

31248473 is an equidigital number, since it uses as much as digits as its factorization.

31248473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 32.

The square root of 31248473 is about 5590.0333630489. The cubic root of 31248473 is about 314.9751319916.

The spelling of 31248473 in words is "thirty-one million, two hundred forty-eight thousand, four hundred seventy-three".