31303243343 has 4 divisors (see below), whose sum is σ = 31392937800. Its totient is φ = 31213548888.

The previous prime is 31303243339. The next prime is 31303243379. The reversal of 31303243343 is 34334230313.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31303243343 - 2² = 31303243339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31303243313) by changing a digit.

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, 44846705 + ... + 44847402.

It is an arithmetic number, because the mean of its divisors is an integer number (7848234450).

Almost surely, 2^31303243343 is an apocalyptic number.

31303243343 is a deficient number, since it is larger than the sum of its proper divisors (89694457).

31303243343 is an equidigital number, since it uses as much as digits as its factorization.

31303243343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89694456.

The product of its (nonzero) digits is 23328, while the sum is 29.

Adding to 31303243343 its reverse (34334230313), we get a palindrome (65637473656).

The spelling of 31303243343 in words is "thirty-one billion, three hundred three million, two hundred forty-three thousand, three hundred forty-three".