31117453 has 2 divisors, whose sum is σ = 31117454. Its totient is φ = 31117452.

The previous prime is 31117441. The next prime is 31117477. The reversal of 31117453 is 35471113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25270729 + 5846724 = 5027^2 + 2418^2 .

It is a cyclic number.

It is not a de Polignac number, because 31117453 - 2¹⁷ = 30986381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31117403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15558726 + 15558727.

It is an arithmetic number, because the mean of its divisors is an integer number (15558727).

Almost surely, 2^31117453 is an apocalyptic number.

It is an amenable number.

31117453 is a deficient number, since it is larger than the sum of its proper divisors (1).

31117453 is an equidigital number, since it uses as much as digits as its factorization.

31117453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 25.

The square root of 31117453 is about 5578.3019817862. The cubic root of 31117453 is about 314.5343013485.

Adding to 31117453 its reverse (35471113), we get a palindrome (66588566).

The spelling of 31117453 in words is "thirty-one million, one hundred seventeen thousand, four hundred fifty-three".