31748161 has 2 divisors, whose sum is σ = 31748162. Its totient is φ = 31748160.

The previous prime is 31748153. The next prime is 31748251. The reversal of 31748161 is 16184713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31708161 + 40000 = 5631^2 + 200^2 .

It is a cyclic number.

It is not a de Polignac number, because 31748161 - 2³ = 31748153 is a prime.

It is not a weakly prime, because it can be changed into another prime (31748111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15874080 + 15874081.

It is an arithmetic number, because the mean of its divisors is an integer number (15874081).

Almost surely, 2^31748161 is an apocalyptic number.

It is an amenable number.

31748161 is a deficient number, since it is larger than the sum of its proper divisors (1).

31748161 is an equidigital number, since it uses as much as digits as its factorization.

31748161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 31748161 is about 5634.5506475672. The cubic root of 31748161 is about 316.6451628365.

The spelling of 31748161 in words is "thirty-one million, seven hundred forty-eight thousand, one hundred sixty-one".