31323197953 has 2 divisors, whose sum is σ = 31323197954. Its totient is φ = 31323197952.

The previous prime is 31323197951. The next prime is 31323197963. The reversal of 31323197953 is 35979132313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29760735169 + 1562462784 = 172513^2 + 39528^2 .

It is a cyclic number.

It is not a de Polignac number, because 31323197953 - 2¹ = 31323197951 is a prime.

It is a super-2 number, since 2×31323197953² (a number of 22 digits) contains 22 as substring.

Together with 31323197951, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31323197951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15661598976 + 15661598977.

It is an arithmetic number, because the mean of its divisors is an integer number (15661598977).

Almost surely, 2^31323197953 is an apocalyptic number.

It is an amenable number.

31323197953 is a deficient number, since it is larger than the sum of its proper divisors (1).

31323197953 is an equidigital number, since it uses as much as digits as its factorization.

31323197953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 459270, while the sum is 46.

It can be divided in two parts, 313 and 23197953, that added together give a triangular number (23198266 = T₆₈₁₁).

The spelling of 31323197953 in words is "thirty-one billion, three hundred twenty-three million, one hundred ninety-seven thousand, nine hundred fifty-three".