31003213243 has 8 divisors (see below), whose sum is σ = 32215264256. Its totient is φ = 29804409000.

The previous prime is 31003213201. The next prime is 31003213261. The reversal of 31003213243 is 34231230013.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31003213243 is a prime.

It is a super-2 number, since 2×31003213243² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31003213543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3306921 + ... + 3316282.

It is an arithmetic number, because the mean of its divisors is an integer number (4026908032).

Almost surely, 2^31003213243 is an apocalyptic number.

31003213243 is a deficient number, since it is larger than the sum of its proper divisors (1212051013).

31003213243 is a wasteful number, since it uses less digits than its factorization.

31003213243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6623385.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31003213243 its reverse (34231230013), we get a palindrome (65234443256).

The spelling of 31003213243 in words is "thirty-one billion, three million, two hundred thirteen thousand, two hundred forty-three".