31321323225 has 18 divisors (see below), whose sum is σ = 56099970446. Its totient is φ = 16704705600.

The previous prime is 31321323199. The next prime is 31321323247. The reversal of 31321323225 is 52232312313.

It is a happy number.

31321323225 is a `hidden beast` number, since 313 + 2 + 1 + 323 + 2 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 16744464 + 31304578761 = 4092^2 + 176931^2 .

It is not a de Polignac number, because 31321323225 - 2⁵ = 31321323193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 69602716 + ... + 69603165.

Almost surely, 2^31321323225 is an apocalyptic number.

It is an amenable number.

31321323225 is a deficient number, since it is larger than the sum of its proper divisors (24778647221).

31321323225 is a wasteful number, since it uses less digits than its factorization.

31321323225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139205897 (or 139205889 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

Adding to 31321323225 its reverse (52232312313), we get a palindrome (83553635538).

The spelling of 31321323225 in words is "thirty-one billion, three hundred twenty-one million, three hundred twenty-three thousand, two hundred twenty-five".