31654215643243 has 2 divisors, whose sum is σ = 31654215643244. Its totient is φ = 31654215643242.

The previous prime is 31654215643187. The next prime is 31654215643261. The reversal of 31654215643243 is 34234651245613.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31654215643243 is a prime.

It is not a weakly prime, because it can be changed into another prime (31654215643343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15827107821621 + 15827107821622.

It is an arithmetic number, because the mean of its divisors is an integer number (15827107821622).

Almost surely, 2^{31654215643243} is an apocalyptic number.

31654215643243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31654215643243 is an equidigital number, since it uses as much as digits as its factorization.

31654215643243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6220800, while the sum is 49.

Adding to 31654215643243 its reverse (34234651245613), we get a palindrome (65888866888856).

The spelling of 31654215643243 in words is "thirty-one trillion, six hundred fifty-four billion, two hundred fifteen million, six hundred forty-three thousand, two hundred forty-three".