31340205205531 has 2 divisors, whose sum is σ = 31340205205532. Its totient is φ = 31340205205530.

The previous prime is 31340205205453. The next prime is 31340205205627. The reversal of 31340205205531 is 13550250204313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31340205205531 - 2¹³ = 31340205197339 is a prime.

It is a super-2 number, since 2×31340205205531² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31340205202531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15670102602765 + 15670102602766.

It is an arithmetic number, because the mean of its divisors is an integer number (15670102602766).

Almost surely, 2^{31340205205531} is an apocalyptic number.

31340205205531 is a deficient number, since it is larger than the sum of its proper divisors (1).

31340205205531 is an equidigital number, since it uses as much as digits as its factorization.

31340205205531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 34.

Adding to 31340205205531 its reverse (13550250204313), we get a palindrome (44890455409844).

The spelling of 31340205205531 in words is "thirty-one trillion, three hundred forty billion, two hundred five million, two hundred five thousand, five hundred thirty-one".