31110401173 has 2 divisors, whose sum is σ = 31110401174. Its totient is φ = 31110401172.

The previous prime is 31110401159. The next prime is 31110401209. The reversal of 31110401173 is 37110401113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27856611409 + 3253789764 = 166903^2 + 57042^2 .

It is a cyclic number.

It is not a de Polignac number, because 31110401173 - 2²⁹ = 30573530261 is a prime.

It is a super-2 number, since 2×31110401173² (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 (31110405173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15555200586 + 15555200587.

It is an arithmetic number, because the mean of its divisors is an integer number (15555200587).

Almost surely, 2^31110401173 is an apocalyptic number.

It is an amenable number.

31110401173 is a deficient number, since it is larger than the sum of its proper divisors (1).

31110401173 is an equidigital number, since it uses as much as digits as its factorization.

31110401173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 22.

Adding to 31110401173 its reverse (37110401113), we get a palindrome (68220802286).

The spelling of 31110401173 in words is "thirty-one billion, one hundred ten million, four hundred one thousand, one hundred seventy-three".