1315621603 has 16 divisors (see below), whose sum is σ = 1367207424. Its totient is φ = 1265224480.

The previous prime is 1315621591. The next prime is 1315621613. The reversal of 1315621603 is 3061265131.

It is a cyclic number.

It is not a de Polignac number, because 1315621603 - 2¹⁷ = 1315490531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1315621613) 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 15 ways as a sum of consecutive naturals, for example, 657801 + ... + 659797.

It is an arithmetic number, because the mean of its divisors is an integer number (85450464).

Almost surely, 2^1315621603 is an apocalyptic number.

1315621603 is a deficient number, since it is larger than the sum of its proper divisors (51585821).

1315621603 is a wasteful number, since it uses less digits than its factorization.

1315621603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2282.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1315621603 is about 36271.4984939966. The cubic root of 1315621603 is about 1095.7471053582.

Adding to 1315621603 its reverse (3061265131), we get a palindrome (4376886734).

The spelling of 1315621603 in words is "one billion, three hundred fifteen million, six hundred twenty-one thousand, six hundred three".