31424217133 has 2 divisors, whose sum is σ = 31424217134. Its totient is φ = 31424217132.

The previous prime is 31424217131. The next prime is 31424217157. The reversal of 31424217133 is 33171242413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16671199689 + 14753017444 = 129117^2 + 121462^2 .

It is a cyclic number.

It is not a de Polignac number, because 31424217133 - 2¹ = 31424217131 is a prime.

Together with 31424217131, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 31424217095 and 31424217104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31424217131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15712108566 + 15712108567.

It is an arithmetic number, because the mean of its divisors is an integer number (15712108567).

Almost surely, 2^31424217133 is an apocalyptic number.

It is an amenable number.

31424217133 is a deficient number, since it is larger than the sum of its proper divisors (1).

31424217133 is an equidigital number, since it uses as much as digits as its factorization.

31424217133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 31.

Adding to 31424217133 its reverse (33171242413), we get a palindrome (64595459546).

The spelling of 31424217133 in words is "thirty-one billion, four hundred twenty-four million, two hundred seventeen thousand, one hundred thirty-three".