31130340225 has 24 divisors (see below), whose sum is σ = 51532549920. Its totient is φ = 16582293120.

The previous prime is 31130340223. The next prime is 31130340229. The reversal of 31130340225 is 52204303113.

It is not a de Polignac number, because 31130340225 - 2¹ = 31130340223 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31130340195 and 31130340204.

It is not an unprimeable number, because it can be changed into a prime (31130340223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195859 + ... + 317208.

It is an arithmetic number, because the mean of its divisors is an integer number (2147189580).

Almost surely, 2^31130340225 is an apocalyptic number.

It is an amenable number.

31130340225 is a deficient number, since it is larger than the sum of its proper divisors (20402209695).

31130340225 is a wasteful number, since it uses less digits than its factorization.

31130340225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513889 (or 513884 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 31130340225 its reverse (52204303113), we get a palindrome (83334643338).

The spelling of 31130340225 in words is "thirty-one billion, one hundred thirty million, three hundred forty thousand, two hundred twenty-five".