31748113 has 4 divisors (see below), whose sum is σ = 32347188. Its totient is φ = 31149040.

The previous prime is 31748111. The next prime is 31748117. The reversal of 31748113 is 31184713.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31184713 = 7 ⋅4454959.

It can be written as a sum of positive squares in 2 ways, for example, as 22212369 + 9535744 = 4713^2 + 3088^2 .

It is a cyclic number.

It is not a de Polignac number, because 31748113 - 2¹ = 31748111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31748111) 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, 299458 + ... + 299563.

It is an arithmetic number, because the mean of its divisors is an integer number (8086797).

Almost surely, 2^31748113 is an apocalyptic number.

It is an amenable number.

31748113 is a deficient number, since it is larger than the sum of its proper divisors (599075).

31748113 is an equidigital number, since it uses as much as digits as its factorization.

31748113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599074.

The product of its digits is 2016, while the sum is 28.

The square root of 31748113 is about 5634.5463881310. The cubic root of 31748113 is about 316.6450032579.

The spelling of 31748113 in words is "thirty-one million, seven hundred forty-eight thousand, one hundred thirteen".