31998000011 has 2 divisors, whose sum is σ = 31998000012. Its totient is φ = 31998000010.

The previous prime is 31997999989. The next prime is 31998000029. The reversal of 31998000011 is 11000089913.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31998000011 is a prime.

It is a super-3 number, since 3×31998000011³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (31998000031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15999000005 + 15999000006.

It is an arithmetic number, because the mean of its divisors is an integer number (15999000006).

Almost surely, 2^31998000011 is an apocalyptic number.

31998000011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31998000011 is an equidigital number, since it uses as much as digits as its factorization.

31998000011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 32.

Adding to 31998000011 its reverse (11000089913), we get a palindrome (42998089924).

The spelling of 31998000011 in words is "thirty-one billion, nine hundred ninety-eight million, eleven", and thus it is an aban number.