31320261425 has 6 divisors (see below), whose sum is σ = 38837124198. Its totient is φ = 25056209120.

The previous prime is 31320261419. The next prime is 31320261443. The reversal of 31320261425 is 52416202313.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1991301376 + 29328960049 = 44624^2 + 171257^2 .

It is not a de Polignac number, because 31320261425 - 2¹⁰ = 31320260401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 626405204 + ... + 626405253.

It is an arithmetic number, because the mean of its divisors is an integer number (6472854033).

Almost surely, 2^31320261425 is an apocalyptic number.

It is an amenable number.

31320261425 is a deficient number, since it is larger than the sum of its proper divisors (7516862773).

31320261425 is a wasteful number, since it uses less digits than its factorization.

31320261425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252810467 (or 1252810462 counting only the distinct ones).

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

Adding to 31320261425 its reverse (52416202313), we get a palindrome (83736463738).

The spelling of 31320261425 in words is "thirty-one billion, three hundred twenty million, two hundred sixty-one thousand, four hundred twenty-five".