31866708113 has 2 divisors, whose sum is σ = 31866708114. Its totient is φ = 31866708112.

The previous prime is 31866708077. The next prime is 31866708121. The reversal of 31866708113 is 31180766813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29476769344 + 2389938769 = 171688^2 + 48887^2 .

It is a cyclic number.

It is not a de Polignac number, because 31866708113 - 2¹⁴ = 31866691729 is a prime.

It is not a weakly prime, because it can be changed into another prime (31866708143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15933354056 + 15933354057.

It is an arithmetic number, because the mean of its divisors is an integer number (15933354057).

Almost surely, 2^31866708113 is an apocalyptic number.

It is an amenable number.

31866708113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31866708113 is an equidigital number, since it uses as much as digits as its factorization.

31866708113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 31866708113 in words is "thirty-one billion, eight hundred sixty-six million, seven hundred eight thousand, one hundred thirteen".