3131117361 has 6 divisors (see below), whose sum is σ = 4522725090. Its totient is φ = 2087411568.

The previous prime is 3131117357. The next prime is 3131117389. The reversal of 3131117361 is 1637111313.

It can be written as a sum of positive squares in only one way, i.e., 3064286736 + 66830625 = 55356^2 + 8175^2 .

It is not a de Polignac number, because 3131117361 - 2² = 3131117357 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3131116361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173950956 + ... + 173950973.

It is an arithmetic number, because the mean of its divisors is an integer number (753787515).

Almost surely, 2^3131117361 is an apocalyptic number.

It is an amenable number.

3131117361 is a deficient number, since it is larger than the sum of its proper divisors (1391607729).

3131117361 is a wasteful number, since it uses less digits than its factorization.

3131117361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347901935 (or 347901932 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 3131117361 is about 55956.3880267481. The cubic root of 3131117361 is about 1462.9622351318.

Adding to 3131117361 its reverse (1637111313), we get a palindrome (4768228674).

The spelling of 3131117361 in words is "three billion, one hundred thirty-one million, one hundred seventeen thousand, three hundred sixty-one".