31271248 has 20 divisors (see below), whose sum is σ = 61215700. Its totient is φ = 15473664.

The previous prime is 31271243. The next prime is 31271257. The reversal of 31271248 is 84217213.

It can be written as a sum of positive squares in 2 ways, for example, as 14197824 + 17073424 = 3768^2 + 4132^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31271243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8523 + ... + 11626.

It is an arithmetic number, because the mean of its divisors is an integer number (3060785).

Almost surely, 2^31271248 is an apocalyptic number.

It is an amenable number.

31271248 is a deficient number, since it is larger than the sum of its proper divisors (29944452).

31271248 is a wasteful number, since it uses less digits than its factorization.

31271248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20254 (or 20248 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 31271248 is about 5592.0700997037. The cubic root of 31271248 is about 315.0516351065.

The spelling of 31271248 in words is "thirty-one million, two hundred seventy-one thousand, two hundred forty-eight".