31361263 has 2 divisors, whose sum is σ = 31361264. Its totient is φ = 31361262.

The previous prime is 31361261. The next prime is 31361279. The reversal of 31361263 is 36216313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31361263 - 2¹ = 31361261 is a prime.

Together with 31361261, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31361261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15680631 + 15680632.

It is an arithmetic number, because the mean of its divisors is an integer number (15680632).

Almost surely, 2^31361263 is an apocalyptic number.

31361263 is a deficient number, since it is larger than the sum of its proper divisors (1).

31361263 is an equidigital number, since it uses as much as digits as its factorization.

31361263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 25.

The square root of 31361263 is about 5600.1127667218. The cubic root of 31361263 is about 315.3536399527.

Adding to 31361263 its reverse (36216313), we get a palindrome (67577576).

The spelling of 31361263 in words is "thirty-one million, three hundred sixty-one thousand, two hundred sixty-three".