1220332313 has 8 divisors (see below), whose sum is σ = 1248004968. Its totient is φ = 1192955904.

The previous prime is 1220332283. The next prime is 1220332319. The reversal of 1220332313 is 3132330221.

It can be written as a sum of positive squares in 4 ways, for example, as 93857344 + 1126474969 = 9688^2 + 33563^2 .

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 1220332313 - 2⁶ = 1220332249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220332319) 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, 65720 + ... + 82217.

It is an arithmetic number, because the mean of its divisors is an integer number (156000621).

Almost surely, 2^1220332313 is an apocalyptic number.

It is an amenable number.

1220332313 is a deficient number, since it is larger than the sum of its proper divisors (27672655).

1220332313 is a wasteful number, since it uses less digits than its factorization.

1220332313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148123.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1220332313 is about 34933.2551160066. The cubic root of 1220332313 is about 1068.6267394616.

Adding to 1220332313 its reverse (3132330221), we get a palindrome (4352662534).

The spelling of 1220332313 in words is "one billion, two hundred twenty million, three hundred thirty-two thousand, three hundred thirteen".