3131120342225 has 12 divisors (see below), whose sum is σ = 3893714132700. Its totient is φ = 2497718913600.

The previous prime is 3131120342221. The next prime is 3131120342243. The reversal of 3131120342225 is 5222430211313.

It can be written as a sum of positive squares in 6 ways, for example, as 825240529 + 3130295101696 = 28727^2 + 1769264^2 .

It is not a de Polignac number, because 3131120342225 - 2² = 3131120342221 is a prime.

It is a super-2 number, since 2×3131120342225² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3131120342221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179425106 + ... + 179442555.

It is an arithmetic number, because the mean of its divisors is an integer number (324476177725).

Almost surely, 2^{3131120342225} is an apocalyptic number.

It is an amenable number.

3131120342225 is a deficient number, since it is larger than the sum of its proper divisors (762593790475).

3131120342225 is a wasteful number, since it uses less digits than its factorization.

3131120342225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358868020 (or 358868015 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 3131120342225 its reverse (5222430211313), we get a palindrome (8353550553538).

The spelling of 3131120342225 in words is "three trillion, one hundred thirty-one billion, one hundred twenty million, three hundred forty-two thousand, two hundred twenty-five".