31331045545 has 8 divisors (see below), whose sum is σ = 37613636424. Its totient is φ = 25053915264.

The previous prime is 31331045539. The next prime is 31331045569. The reversal of 31331045545 is 54554013313.

It can be written as a sum of positive squares in 4 ways, for example, as 440874009 + 30890171536 = 20997^2 + 175756^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31331045545 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31331045545.

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 7 ways as a sum of consecutive naturals, for example, 1352514 + ... + 1375483.

It is an arithmetic number, because the mean of its divisors is an integer number (4701704553).

Almost surely, 2^31331045545 is an apocalyptic number.

It is an amenable number.

31331045545 is a deficient number, since it is larger than the sum of its proper divisors (6282590879).

31331045545 is a wasteful number, since it uses less digits than its factorization.

31331045545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730299.

The product of its (nonzero) digits is 54000, while the sum is 34.

Adding to 31331045545 its reverse (54554013313), we get a palindrome (85885058858).

The spelling of 31331045545 in words is "thirty-one billion, three hundred thirty-one million, forty-five thousand, five hundred forty-five".