31040413 has 2 divisors, whose sum is σ = 31040414. Its totient is φ = 31040412.

The previous prime is 31040407. The next prime is 31040459. The reversal of 31040413 is 31404013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23406244 + 7634169 = 4838^2 + 2763^2 .

It is a cyclic number.

It is not a de Polignac number, because 31040413 - 2⁵ = 31040381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31440413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15520206 + 15520207.

It is an arithmetic number, because the mean of its divisors is an integer number (15520207).

Almost surely, 2^31040413 is an apocalyptic number.

It is an amenable number.

31040413 is a deficient number, since it is larger than the sum of its proper divisors (1).

31040413 is an equidigital number, since it uses as much as digits as its factorization.

31040413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31040413 is about 5571.3923753403. The cubic root of 31040413 is about 314.2745141522.

Adding to 31040413 its reverse (31404013), we get a palindrome (62444426).

The spelling of 31040413 in words is "thirty-one million, forty thousand, four hundred thirteen".