31112617 has 2 divisors, whose sum is σ = 31112618. Its totient is φ = 31112616.

The previous prime is 31112611. The next prime is 31112651. The reversal of 31112617 is 71621113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30074256 + 1038361 = 5484^2 + 1019^2 .

It is a cyclic number.

It is not a de Polignac number, because 31112617 - 2¹⁵ = 31079849 is a prime.

It is equal to p_1922440 and since 31112617 and 1922440 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (31112611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556308 + 15556309.

It is an arithmetic number, because the mean of its divisors is an integer number (15556309).

Almost surely, 2^31112617 is an apocalyptic number.

It is an amenable number.

31112617 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112617 is an equidigital number, since it uses as much as digits as its factorization.

31112617 is an evil number, because the sum of its binary digits is even.

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

The square root of 31112617 is about 5577.8684997049. The cubic root of 31112617 is about 314.5180064556.

The spelling of 31112617 in words is "thirty-one million, one hundred twelve thousand, six hundred seventeen".