31055117 has 2 divisors, whose sum is σ = 31055118. Its totient is φ = 31055116.

The previous prime is 31055111. The next prime is 31055119. The reversal of 31055117 is 71155013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28185481 + 2869636 = 5309^2 + 1694^2 .

It is a cyclic number.

It is not a de Polignac number, because 31055117 - 2⁶ = 31055053 is a prime.

Together with 31055119, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31055092 and 31055101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31055111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15527558 + 15527559.

It is an arithmetic number, because the mean of its divisors is an integer number (15527559).

Almost surely, 2^31055117 is an apocalyptic number.

It is an amenable number.

31055117 is a deficient number, since it is larger than the sum of its proper divisors (1).

31055117 is an equidigital number, since it uses as much as digits as its factorization.

31055117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 525, while the sum is 23.

The square root of 31055117 is about 5572.7118174189. The cubic root of 31055117 is about 314.3241307920.

The spelling of 31055117 in words is "thirty-one million, fifty-five thousand, one hundred seventeen".