1220304231 has 16 divisors (see below), whose sum is σ = 1830745600. Its totient is φ = 803236824.

The previous prime is 1220304221. The next prime is 1220304233. The reversal of 1220304231 is 1324030221.

It is not a de Polignac number, because 1220304231 - 2⁵ = 1220304199 is a prime.

It is a super-2 number, since 2×1220304231² = 2978284832393002722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220304233) 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 15 ways as a sum of consecutive naturals, for example, 283921 + ... + 288186.

It is an arithmetic number, because the mean of its divisors is an integer number (114421600).

Almost surely, 2^1220304231 is an apocalyptic number.

1220304231 is a deficient number, since it is larger than the sum of its proper divisors (610441369).

1220304231 is an equidigital number, since it uses as much as digits as its factorization.

1220304231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572195 (or 572189 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1220304231 is about 34932.8531757714. The cubic root of 1220304231 is about 1068.6185424031.

Adding to 1220304231 its reverse (1324030221), we get a palindrome (2544334452).

The spelling of 1220304231 in words is "one billion, two hundred twenty million, three hundred four thousand, two hundred thirty-one".