31361117 has 2 divisors, whose sum is σ = 31361118. Its totient is φ = 31361116.

The previous prime is 31361111. The next prime is 31361123. The reversal of 31361117 is 71116313.

It is a balanced prime because it is at equal distance from previous prime (31361111) and next prime (31361123).

It can be written as a sum of positive squares in only one way, i.e., 30349081 + 1012036 = 5509^2 + 1006^2 .

It is an emirp because it is prime and its reverse (71116313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31361117 - 2¹⁶ = 31295581 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31361092 and 31361101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31361111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15680558 + 15680559.

It is an arithmetic number, because the mean of its divisors is an integer number (15680559).

Almost surely, 2^31361117 is an apocalyptic number.

It is an amenable number.

31361117 is a deficient number, since it is larger than the sum of its proper divisors (1).

31361117 is an equidigital number, since it uses as much as digits as its factorization.

31361117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378, while the sum is 23.

The square root of 31361117 is about 5600.0997312548. The cubic root of 31361117 is about 315.3531505836.

The spelling of 31361117 in words is "thirty-one million, three hundred sixty-one thousand, one hundred seventeen".