31065481 has 2 divisors, whose sum is σ = 31065482. Its totient is φ = 31065480.

The previous prime is 31065469. The next prime is 31065487. The reversal of 31065481 is 18456013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28259856 + 2805625 = 5316^2 + 1675^2 .

It is an emirp because it is prime and its reverse (18456013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31065481 - 2¹⁹ = 30541193 is a prime.

It is a super-2 number, since 2×31065481² = 1930128219522722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31065487) 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, 15532740 + 15532741.

It is an arithmetic number, because the mean of its divisors is an integer number (15532741).

Almost surely, 2^31065481 is an apocalyptic number.

It is an amenable number.

31065481 is a deficient number, since it is larger than the sum of its proper divisors (1).

31065481 is an equidigital number, since it uses as much as digits as its factorization.

31065481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 31065481 is about 5573.6416282355. The cubic root of 31065481 is about 314.3590932854.

The spelling of 31065481 in words is "thirty-one million, sixty-five thousand, four hundred eighty-one".