31321637341 has 2 divisors, whose sum is σ = 31321637342. Its totient is φ = 31321637340.

The previous prime is 31321637323. The next prime is 31321637357. The reversal of 31321637341 is 14373612313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29740382116 + 1581255225 = 172454^2 + 39765^2 .

It is an emirp because it is prime and its reverse (14373612313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31321637341 - 2²⁹ = 30784766429 is a prime.

It is a super-2 number, since 2×31321637341² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31321637297 and 31321637306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31321647341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660818670 + 15660818671.

It is an arithmetic number, because the mean of its divisors is an integer number (15660818671).

Almost surely, 2^31321637341 is an apocalyptic number.

It is an amenable number.

31321637341 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321637341 is an equidigital number, since it uses as much as digits as its factorization.

31321637341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 34.

The spelling of 31321637341 in words is "thirty-one billion, three hundred twenty-one million, six hundred thirty-seven thousand, three hundred forty-one".