31074881 has 2 divisors, whose sum is σ = 31074882. Its totient is φ = 31074880.

The previous prime is 31074877. The next prime is 31074889. The reversal of 31074881 is 18847013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16321600 + 14753281 = 4040^2 + 3841^2 .

It is a cyclic number.

It is not a de Polignac number, because 31074881 - 2² = 31074877 is a prime.

It is a super-2 number, since 2×31074881² = 1931296458328322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31074889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15537440 + 15537441.

It is an arithmetic number, because the mean of its divisors is an integer number (15537441).

Almost surely, 2^31074881 is an apocalyptic number.

It is an amenable number.

31074881 is a deficient number, since it is larger than the sum of its proper divisors (1).

31074881 is an equidigital number, since it uses as much as digits as its factorization.

31074881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 31074881 is about 5574.4848192456. The cubic root of 31074881 is about 314.3907970434.

The spelling of 31074881 in words is "thirty-one million, seventy-four thousand, eight hundred eighty-one".