31284378425 has 12 divisors (see below), whose sum is σ = 38993633340. Its totient is φ = 24897822720.

The previous prime is 31284378403. The next prime is 31284378457. The reversal of 31284378425 is 52487348213.

It can be written as a sum of positive squares in 6 ways, for example, as 674041 + 31283704384 = 821^2 + 176872^2 .

It is not a de Polignac number, because 31284378425 - 2²⁰ = 31283329849 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31284378425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3237080 + ... + 3246729.

It is an arithmetic number, because the mean of its divisors is an integer number (3249469445).

Almost surely, 2^31284378425 is an apocalyptic number.

It is an amenable number.

31284378425 is a deficient number, since it is larger than the sum of its proper divisors (7709254915).

31284378425 is a wasteful number, since it uses less digits than its factorization.

31284378425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6484012 (or 6484007 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 47.

The spelling of 31284378425 in words is "thirty-one billion, two hundred eighty-four million, three hundred seventy-eight thousand, four hundred twenty-five".