32313312181 has 2 divisors, whose sum is σ = 32313312182. Its totient is φ = 32313312180.

The previous prime is 32313312167. The next prime is 32313312209. The reversal of 32313312181 is 18121331323.

It is an a-pointer prime, because the next prime (32313312209) can be obtained adding 32313312181 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25093411281 + 7219900900 = 158409^2 + 84970^2 .

It is a cyclic number.

It is not a de Polignac number, because 32313312181 - 2⁵ = 32313312149 is a prime.

It is a super-2 number, since 2×32313312181² (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 (32313312121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16156656090 + 16156656091.

It is an arithmetic number, because the mean of its divisors is an integer number (16156656091).

Almost surely, 2^32313312181 is an apocalyptic number.

It is an amenable number.

32313312181 is a deficient number, since it is larger than the sum of its proper divisors (1).

32313312181 is an equidigital number, since it uses as much as digits as its factorization.

32313312181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The spelling of 32313312181 in words is "thirty-two billion, three hundred thirteen million, three hundred twelve thousand, one hundred eighty-one".