1220263313 has 4 divisors (see below), whose sum is σ = 1220401728. Its totient is φ = 1220124900.

The previous prime is 1220263307. The next prime is 1220263327. The reversal of 1220263313 is 3133620221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3133620221 = 6299 ⋅497479.

It is a cyclic number.

It is not a de Polignac number, because 1220263313 - 2⁶ = 1220263249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220263613) 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 3 ways as a sum of consecutive naturals, for example, 55013 + ... + 73938.

It is an arithmetic number, because the mean of its divisors is an integer number (305100432).

Almost surely, 2^1220263313 is an apocalyptic number.

It is an amenable number.

1220263313 is a deficient number, since it is larger than the sum of its proper divisors (138415).

1220263313 is an equidigital number, since it uses as much as digits as its factorization.

1220263313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138414.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 1220263313 is about 34932.2675044149. The cubic root of 1220263313 is about 1068.6065983263.

Adding to 1220263313 its reverse (3133620221), we get a palindrome (4353883534).

The spelling of 1220263313 in words is "one billion, two hundred twenty million, two hundred sixty-three thousand, three hundred thirteen".