1220356343 has 8 divisors (see below), whose sum is σ = 1227863280. Its totient is φ = 1212868800.

The previous prime is 1220356289. The next prime is 1220356351. The reversal of 1220356343 is 3436530221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220356343 - 2⁸ = 1220356087 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 (1220356393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133196 + ... + 142062.

It is an arithmetic number, because the mean of its divisors is an integer number (153482910).

Almost surely, 2^1220356343 is an apocalyptic number.

1220356343 is a deficient number, since it is larger than the sum of its proper divisors (7506937).

1220356343 is an equidigital number, since it uses as much as digits as its factorization.

1220356343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9697.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 1220356343 is about 34933.5990559232. The cubic root of 1220356343 is about 1068.6337536527.

Adding to 1220356343 its reverse (3436530221), we get a palindrome (4656886564).

The spelling of 1220356343 in words is "one billion, two hundred twenty million, three hundred fifty-six thousand, three hundred forty-three".