31311424225 has 48 divisors (see below), whose sum is σ = 40041437184. Its totient is φ = 24280200000.

The previous prime is 31311424223. The next prime is 31311424237. The reversal of 31311424225 is 52242411313.

It is not a de Polignac number, because 31311424225 - 2¹ = 31311424223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31311424193 and 31311424202.

It is not an unprimeable number, because it can be changed into a prime (31311424223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41692600 + ... + 41693350.

It is an arithmetic number, because the mean of its divisors is an integer number (834196608).

Almost surely, 2^31311424225 is an apocalyptic number.

It is an amenable number.

31311424225 is a deficient number, since it is larger than the sum of its proper divisors (8730012959).

31311424225 is a wasteful number, since it uses less digits than its factorization.

31311424225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198 (or 1193 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

Adding to 31311424225 its reverse (52242411313), we get a palindrome (83553835538).

The spelling of 31311424225 in words is "thirty-one billion, three hundred eleven million, four hundred twenty-four thousand, two hundred twenty-five".