1220313143 has 16 divisors (see below), whose sum is σ = 1418978304. Its totient is φ = 1027810080.

The previous prime is 1220313137. The next prime is 1220313161. The reversal of 1220313143 is 3413130221.

It is a cyclic number.

It is not a de Polignac number, because 1220313143 - 2¹⁸ = 1220050999 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 (1220313163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199121 + ... + 205157.

It is an arithmetic number, because the mean of its divisors is an integer number (88686144).

Almost surely, 2^1220313143 is an apocalyptic number.

1220313143 is a deficient number, since it is larger than the sum of its proper divisors (198665161).

1220313143 is an equidigital number, since it uses as much as digits as its factorization.

1220313143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6542.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1220313143 is about 34932.9807345437. The cubic root of 1220313143 is about 1068.6211438050.

Adding to 1220313143 its reverse (3413130221), we get a palindrome (4633443364).

The spelling of 1220313143 in words is "one billion, two hundred twenty million, three hundred thirteen thousand, one hundred forty-three".