31465481 has 2 divisors, whose sum is σ = 31465482. Its totient is φ = 31465480.

The previous prime is 31465459. The next prime is 31465529. The reversal of 31465481 is 18456413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26988025 + 4477456 = 5195^2 + 2116^2 .

It is a cyclic number.

It is not a de Polignac number, because 31465481 - 2⁶ = 31465417 is a prime.

It is a super-2 number, since 2×31465481² = 1980152989122722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31465451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15732740 + 15732741.

It is an arithmetic number, because the mean of its divisors is an integer number (15732741).

Almost surely, 2^31465481 is an apocalyptic number.

It is an amenable number.

31465481 is a deficient number, since it is larger than the sum of its proper divisors (1).

31465481 is an equidigital number, since it uses as much as digits as its factorization.

31465481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 31465481 is about 5609.4100402805. The cubic root of 31465481 is about 315.7025755922.

The spelling of 31465481 in words is "thirty-one million, four hundred sixty-five thousand, four hundred eighty-one".