31261240003406 has 16 divisors (see below), whose sum is σ = 53656776942720. Its totient is φ = 13381154338680.

The previous prime is 31261240003361. The next prime is 31261240003421. The reversal of 31261240003406 is 60430004216213.

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 7 ways as a sum of consecutive naturals, for example, 1376650616 + ... + 1376673323.

It is an arithmetic number, because the mean of its divisors is an integer number (3353548558920).

Almost surely, 2^{31261240003406} is an apocalyptic number.

31261240003406 is a deficient number, since it is larger than the sum of its proper divisors (22395536939314).

31261240003406 is a wasteful number, since it uses less digits than its factorization.

31261240003406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2753324759.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 31261240003406 its reverse (60430004216213), we get a palindrome (91691244219619).

The spelling of 31261240003406 in words is "thirty-one trillion, two hundred sixty-one billion, two hundred forty million, three thousand, four hundred six".