31343052661 has 2 divisors, whose sum is σ = 31343052662. Its totient is φ = 31343052660.

The previous prime is 31343052613. The next prime is 31343052673. The reversal of 31343052661 is 16625034313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29624950161 + 1718102500 = 172119^2 + 41450^2 .

It is a cyclic number.

It is not a de Polignac number, because 31343052661 - 2²⁵ = 31309498229 is a prime.

It is a super-2 number, since 2×31343052661² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31343022661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15671526330 + 15671526331.

It is an arithmetic number, because the mean of its divisors is an integer number (15671526331).

Almost surely, 2^31343052661 is an apocalyptic number.

It is an amenable number.

31343052661 is a deficient number, since it is larger than the sum of its proper divisors (1).

31343052661 is an equidigital number, since it uses as much as digits as its factorization.

31343052661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 34.

Adding to 31343052661 its reverse (16625034313), we get a palindrome (47968086974).

The spelling of 31343052661 in words is "thirty-one billion, three hundred forty-three million, fifty-two thousand, six hundred sixty-one".