31503043042 has 8 divisors (see below), whose sum is σ = 47256997356. Its totient is φ = 15750710592.

The previous prime is 31503043037. The next prime is 31503043079. The reversal of 31503043042 is 24034030513.

It can be written as a sum of positive squares in 2 ways, for example, as 30660360201 + 842682841 = 175101^2 + 29029^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×31503043042² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31503042998 and 31503043016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355683 + ... + 435334.

Almost surely, 2^31503043042 is an apocalyptic number.

31503043042 is a deficient number, since it is larger than the sum of its proper divisors (15753954314).

31503043042 is a wasteful number, since it uses less digits than its factorization.

31503043042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810932.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 31503043042 its reverse (24034030513), we get a palindrome (55537073555).

The spelling of 31503043042 in words is "thirty-one billion, five hundred three million, forty-three thousand, forty-two".