1220343131 has 8 divisors (see below), whose sum is σ = 1455316224. Its totient is φ = 1000529640.

The previous prime is 1220343097. The next prime is 1220343143. The reversal of 1220343131 is 1313430221.

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 1220343131 - 2⁶ = 1220343067 is a prime.

It is a super-2 number, since 2×1220343131² = 2978474714757766322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220343151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3789725 + ... + 3790046.

It is an arithmetic number, because the mean of its divisors is an integer number (181914528).

Almost surely, 2^1220343131 is an apocalyptic number.

1220343131 is a deficient number, since it is larger than the sum of its proper divisors (234973093).

1220343131 is an equidigital number, since it uses as much as digits as its factorization.

1220343131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7579801.

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

The square root of 1220343131 is about 34933.4099537964. The cubic root of 1220343131 is about 1068.6298971725.

Adding to 1220343131 its reverse (1313430221), we get a palindrome (2533773352).

The spelling of 1220343131 in words is "one billion, two hundred twenty million, three hundred forty-three thousand, one hundred thirty-one".