31384040516 has 12 divisors (see below), whose sum is σ = 54923316588. Its totient is φ = 15691664352.

The previous prime is 31384040491. The next prime is 31384040531. The reversal of 31384040516 is 61504048313.

It can be written as a sum of positive squares in 2 ways, for example, as 25697372416 + 5686668100 = 160304^2 + 75410^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273530 + ... + 370926.

It is an arithmetic number, because the mean of its divisors is an integer number (4576943049).

Almost surely, 2^31384040516 is an apocalyptic number.

It is an amenable number.

31384040516 is a deficient number, since it is larger than the sum of its proper divisors (23539276072).

31384040516 is a wasteful number, since it uses less digits than its factorization.

31384040516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177958 (or 177956 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 31384040516 its reverse (61504048313), we get a palindrome (92888088829).

The spelling of 31384040516 in words is "thirty-one billion, three hundred eighty-four million, forty thousand, five hundred sixteen".