31240043042 has 32 divisors (see below), whose sum is σ = 50828601600. Its totient is φ = 14314719168.

The previous prime is 31240042993. The next prime is 31240043069. The reversal of 31240043042 is 24034004213.

It is a super-2 number, since 2×31240043042² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31240042999 and 31240043017.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3986384 + ... + 3994212.

It is an arithmetic number, because the mean of its divisors is an integer number (1588393800).

Almost surely, 2^31240043042 is an apocalyptic number.

31240043042 is a deficient number, since it is larger than the sum of its proper divisors (19588558558).

31240043042 is a wasteful number, since it uses less digits than its factorization.

31240043042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8930.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 31240043042 its reverse (24034004213), we get a palindrome (55274047255).

The spelling of 31240043042 in words is "thirty-one billion, two hundred forty million, forty-three thousand, forty-two".