31042221343 has 4 divisors (see below), whose sum is σ = 35476824400. Its totient is φ = 26607618288.

The previous prime is 31042221341. The next prime is 31042221347. The reversal of 31042221343 is 34312224013.

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 31042221343 - 2¹ = 31042221341 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 (31042221341) 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, 2217301518 + ... + 2217301531.

It is an arithmetic number, because the mean of its divisors is an integer number (8869206100).

Almost surely, 2^31042221343 is an apocalyptic number.

31042221343 is a deficient number, since it is larger than the sum of its proper divisors (4434603057).

31042221343 is an equidigital number, since it uses as much as digits as its factorization.

31042221343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4434603056.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31042221343 its reverse (34312224013), we get a palindrome (65354445356).

The spelling of 31042221343 in words is "thirty-one billion, forty-two million, two hundred twenty-one thousand, three hundred forty-three".