31246081 has 2 divisors, whose sum is σ = 31246082. Its totient is φ = 31246080.

The previous prime is 31246063. The next prime is 31246099. The reversal of 31246081 is 18064213.

It is a balanced prime because it is at equal distance from previous prime (31246063) and next prime (31246099).

It can be written as a sum of positive squares in only one way, i.e., 31181056 + 65025 = 5584^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 31246081 - 2⁷ = 31245953 is a prime.

It is a super-2 number, since 2×31246081² = 1952635155717122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31246181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15623040 + 15623041.

It is an arithmetic number, because the mean of its divisors is an integer number (15623041).

Almost surely, 2^31246081 is an apocalyptic number.

It is an amenable number.

31246081 is a deficient number, since it is larger than the sum of its proper divisors (1).

31246081 is an equidigital number, since it uses as much as digits as its factorization.

31246081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 31246081 is about 5589.8194067429. The cubic root of 31246081 is about 314.9670949083.

The spelling of 31246081 in words is "thirty-one million, two hundred forty-six thousand, eighty-one".