1303216505 has 8 divisors (see below), whose sum is σ = 1589497224. Its totient is φ = 1025481600.

The previous prime is 1303216487. The next prime is 1303216559. The reversal of 1303216505 is 5056123031.

It can be written as a sum of positive squares in 4 ways, for example, as 136515856 + 1166700649 = 11684^2 + 34157^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1303216505 - 2¹⁴ = 1303200121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2136116 + ... + 2136725.

It is an arithmetic number, because the mean of its divisors is an integer number (198687153).

Almost surely, 2^1303216505 is an apocalyptic number.

It is an amenable number.

1303216505 is a deficient number, since it is larger than the sum of its proper divisors (286280719).

1303216505 is an equidigital number, since it uses as much as digits as its factorization.

1303216505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4272907.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 1303216505 is about 36100.0900968405. The cubic root of 1303216505 is about 1092.2922623934.

Adding to 1303216505 its reverse (5056123031), we get a palindrome (6359339536).

The spelling of 1303216505 in words is "one billion, three hundred three million, two hundred sixteen thousand, five hundred five".