31205340412 has 12 divisors (see below), whose sum is σ = 54610697680. Its totient is φ = 15602283936.

The previous prime is 31205340277. The next prime is 31205340421. The reversal of 31205340412 is 21404350213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162313 + ... + 297919.

Almost surely, 2^31205340412 is an apocalyptic number.

It is an amenable number.

31205340412 is a deficient number, since it is larger than the sum of its proper divisors (23405357268).

31205340412 is a wasteful number, since it uses less digits than its factorization.

31205340412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193140 (or 193138 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 31205340412 its reverse (21404350213), we get a palindrome (52609690625).

The spelling of 31205340412 in words is "thirty-one billion, two hundred five million, three hundred forty thousand, four hundred twelve".