31220005343 has 4 divisors (see below), whose sum is σ = 31685975640. Its totient is φ = 30754035048.

The previous prime is 31220005321. The next prime is 31220005367. The reversal of 31220005343 is 34350002213.

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 31220005343 - 2⁸ = 31220005087 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 (31220005393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232985048 + ... + 232985181.

It is an arithmetic number, because the mean of its divisors is an integer number (7921493910).

Almost surely, 2^31220005343 is an apocalyptic number.

31220005343 is a deficient number, since it is larger than the sum of its proper divisors (465970297).

31220005343 is an equidigital number, since it uses as much as digits as its factorization.

31220005343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465970296.

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 31220005343 its reverse (34350002213), we get a palindrome (65570007556).

The spelling of 31220005343 in words is "thirty-one billion, two hundred twenty million, five thousand, three hundred forty-three".