31315463 has 2 divisors, whose sum is σ = 31315464. Its totient is φ = 31315462.

The previous prime is 31315457. The next prime is 31315499. The reversal of 31315463 is 36451313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31315463 - 2¹² = 31311367 is a prime.

It is a Sophie Germain prime.

It is equal to p_1934225 and since 31315463 and 1934225 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31315423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15657731 + 15657732.

It is an arithmetic number, because the mean of its divisors is an integer number (15657732).

Almost surely, 2^31315463 is an apocalyptic number.

31315463 is a deficient number, since it is larger than the sum of its proper divisors (1).

31315463 is an equidigital number, since it uses as much as digits as its factorization.

31315463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 26.

The square root of 31315463 is about 5596.0220692917. The cubic root of 31315463 is about 315.2000509708.

Adding to 31315463 its reverse (36451313), we get a palindrome (67766776).

The spelling of 31315463 in words is "thirty-one million, three hundred fifteen thousand, four hundred sixty-three".