31007985750242 has 18 divisors (see below), whose sum is σ = 46724134039713. Its totient is φ = 15433594115952.

The previous prime is 31007985750233. The next prime is 31007985750253. The reversal of 31007985750242 is 24205758970013.

It can be written as a sum of positive squares in 2 ways, for example, as 25563934854241 + 5444050896001 = 5056079^2 + 2333249^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3937511.

It is a super-2 number, since 2×31007985750242² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1756121078 + ... + 1756138734.

Almost surely, 2^{31007985750242} is an apocalyptic number.

31007985750242 is a deficient number, since it is larger than the sum of its proper divisors (15716148289471).

31007985750242 is an frugal number, since it uses more digits than its factorization.

31007985750242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35762 (or 17882 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 53.

The spelling of 31007985750242 in words is "thirty-one trillion, seven billion, nine hundred eighty-five million, seven hundred fifty thousand, two hundred forty-two".