1303223013 has 20 divisors (see below), whose sum is σ = 1958064108. Its totient is φ = 863784000.

The previous prime is 1303222961. The next prime is 1303223021. The reversal of 1303223013 is 3103223031.

It can be written as a sum of positive squares in 2 ways, for example, as 1149413409 + 153809604 = 33903^2 + 12402^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1303223013 is a prime.

It is a super-2 number, since 2×1303223013² = 3396780443225596338, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303223113) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 32488 + ... + 60513.

Almost surely, 2^1303223013 is an apocalyptic number.

It is an amenable number.

1303223013 is a deficient number, since it is larger than the sum of its proper divisors (654841095).

1303223013 is an equidigital number, since it uses as much as digits as its factorization.

1303223013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93186 (or 93177 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 1303223013 is about 36100.1802350071. The cubic root of 1303223013 is about 1092.2940806193.

Adding to 1303223013 its sum of digits (18), we get a palindrome (1303223031).

Adding to 1303223013 its reverse (3103223031), we get a palindrome (4406446044).

The spelling of 1303223013 in words is "one billion, three hundred three million, two hundred twenty-three thousand, thirteen".