31117153 has 2 divisors, whose sum is σ = 31117154. Its totient is φ = 31117152.

The previous prime is 31117133. The next prime is 31117169. The reversal of 31117153 is 35171113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22014864 + 9102289 = 4692^2 + 3017^2 .

It is a cyclic number.

It is not a de Polignac number, because 31117153 - 2²¹ = 29020001 is a prime.

It is not a weakly prime, because it can be changed into another prime (31117103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15558576 + 15558577.

It is an arithmetic number, because the mean of its divisors is an integer number (15558577).

Almost surely, 2^31117153 is an apocalyptic number.

It is an amenable number.

31117153 is a deficient number, since it is larger than the sum of its proper divisors (1).

31117153 is an equidigital number, since it uses as much as digits as its factorization.

31117153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 315, while the sum is 22.

The square root of 31117153 is about 5578.2750918183. The cubic root of 31117153 is about 314.5332905481.

Adding to 31117153 its reverse (35171113), we get a palindrome (66288266).

The spelling of 31117153 in words is "thirty-one million, one hundred seventeen thousand, one hundred fifty-three".