31243773425 has 12 divisors (see below), whose sum is σ = 41021237196. Its totient is φ = 23524723200.

The previous prime is 31243773419. The next prime is 31243773461. The reversal of 31243773425 is 52437734213.

It can be written as a sum of positive squares in 6 ways, for example, as 617373409 + 30626400016 = 24847^2 + 175004^2 .

It is not a de Polignac number, because 31243773425 - 2²² = 31239579121 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 11 ways as a sum of consecutive naturals, for example, 36756956 + ... + 36757805.

It is an arithmetic number, because the mean of its divisors is an integer number (3418436433).

Almost surely, 2^31243773425 is an apocalyptic number.

It is an amenable number.

31243773425 is a deficient number, since it is larger than the sum of its proper divisors (9777463771).

31243773425 is a wasteful number, since it uses less digits than its factorization.

31243773425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73514788 (or 73514783 counting only the distinct ones).

The product of its digits is 423360, while the sum is 41.

The spelling of 31243773425 in words is "thirty-one billion, two hundred forty-three million, seven hundred seventy-three thousand, four hundred twenty-five".