1303331213 has 4 divisors (see below), whose sum is σ = 1303897980. Its totient is φ = 1302764448.

The previous prime is 1303331209. The next prime is 1303331243. The reversal of 1303331213 is 3121333031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3121333031 = 773 ⋅4037947.

It can be written as a sum of positive squares in 2 ways, for example, as 1128086569 + 175244644 = 33587^2 + 13238^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303331213 - 2² = 1303331209 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 (1303331243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279920 + ... + 284537.

It is an arithmetic number, because the mean of its divisors is an integer number (325974495).

Almost surely, 2^1303331213 is an apocalyptic number.

It is an amenable number.

1303331213 is a deficient number, since it is larger than the sum of its proper divisors (566767).

1303331213 is an equidigital number, since it uses as much as digits as its factorization.

1303331213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566766.

The product of its (nonzero) digits is 486, while the sum is 20.

The square root of 1303331213 is about 36101.6788113794. The cubic root of 1303331213 is about 1092.3243089961.

Adding to 1303331213 its reverse (3121333031), we get a palindrome (4424664244).

The spelling of 1303331213 in words is "one billion, three hundred three million, three hundred thirty-one thousand, two hundred thirteen".