1303303213 has 4 divisors (see below), whose sum is σ = 1305318240. Its totient is φ = 1301288188.

The previous prime is 1303303201. The next prime is 1303303223. The reversal of 1303303213 is 3123033031.

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: 3123033031 = 31 ⋅100743001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1303303213 is a prime.

It is a super-2 number, since 2×1303303213² = 3397198530032246738, 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 (1303303223) 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, 1006543 + ... + 1007836.

It is an arithmetic number, because the mean of its divisors is an integer number (326329560).

Almost surely, 2^1303303213 is an apocalyptic number.

It is an amenable number.

1303303213 is a deficient number, since it is larger than the sum of its proper divisors (2015027).

1303303213 is an equidigital number, since it uses as much as digits as its factorization.

1303303213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015026.

The product of its (nonzero) digits is 486, while the sum is 19.

The square root of 1303303213 is about 36101.2910156964. The cubic root of 1303303213 is about 1092.3164866561.

Adding to 1303303213 its reverse (3123033031), we get a palindrome (4426336244).

The spelling of 1303303213 in words is "one billion, three hundred three million, three hundred three thousand, two hundred thirteen".