31320853 has 2 divisors, whose sum is σ = 31320854. Its totient is φ = 31320852.

The previous prime is 31320829. The next prime is 31320889. The reversal of 31320853 is 35802313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31281649 + 39204 = 5593^2 + 198^2 .

It is an emirp because it is prime and its reverse (35802313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31320853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31320053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660426 + 15660427.

It is an arithmetic number, because the mean of its divisors is an integer number (15660427).

Almost surely, 2^31320853 is an apocalyptic number.

It is an amenable number.

31320853 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320853 is an equidigital number, since it uses as much as digits as its factorization.

31320853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 31320853 is about 5596.5036406671. The cubic root of 31320853 is about 315.2181339522.

The spelling of 31320853 in words is "thirty-one million, three hundred twenty thousand, eight hundred fifty-three".