31311253 has 2 divisors, whose sum is σ = 31311254. Its totient is φ = 31311252.

The previous prime is 31311251. The next prime is 31311277. The reversal of 31311253 is 35211313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16703569 + 14607684 = 4087^2 + 3822^2 .

It is a cyclic number.

It is not a de Polignac number, because 31311253 - 2¹ = 31311251 is a prime.

Together with 31311251, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31311253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31311251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655626 + 15655627.

It is an arithmetic number, because the mean of its divisors is an integer number (15655627).

Almost surely, 2^31311253 is an apocalyptic number.

It is an amenable number.

31311253 is a deficient number, since it is larger than the sum of its proper divisors (1).

31311253 is an equidigital number, since it uses as much as digits as its factorization.

31311253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 19.

The square root of 31311253 is about 5595.6458965878. The cubic root of 31311253 is about 315.1859253434.

Adding to 31311253 its reverse (35211313), we get a palindrome (66522566).

The spelling of 31311253 in words is "thirty-one million, three hundred eleven thousand, two hundred fifty-three".