31213320244 has 12 divisors (see below), whose sum is σ = 54624601024. Its totient is φ = 15606291384.

The previous prime is 31213320199. The next prime is 31213320253. The reversal of 31213320244 is 44202331213.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 204037 + ... + 322579.

Almost surely, 2^31213320244 is an apocalyptic number.

It is an amenable number.

31213320244 is a deficient number, since it is larger than the sum of its proper divisors (23411280780).

31213320244 is a wasteful number, since it uses less digits than its factorization.

31213320244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184374 (or 184372 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31213320244 its reverse (44202331213), we get a palindrome (75415651457).

The spelling of 31213320244 in words is "thirty-one billion, two hundred thirteen million, three hundred twenty thousand, two hundred forty-four".