1315161603 has 20 divisors (see below), whose sum is σ = 2245285680. Its totient is φ = 751520592.

The previous prime is 1315161593. The next prime is 1315161619. The reversal of 1315161603 is 3061615131.

1315161603 is a `hidden beast` number, since 1 + 3 + 1 + 51 + 6 + 1 + 603 = 666.

It is not a de Polignac number, because 1315161603 - 2⁴ = 1315161587 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1315161203) 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, 1159188 + ... + 1160321.

It is an arithmetic number, because the mean of its divisors is an integer number (112264284).

Almost surely, 2^1315161603 is an apocalyptic number.

1315161603 is a deficient number, since it is larger than the sum of its proper divisors (930124077).

1315161603 is an equidigital number, since it uses as much as digits as its factorization.

1315161603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319528 (or 2319519 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 1315161603 is about 36265.1568726788. The cubic root of 1315161603 is about 1095.6193831154.

Adding to 1315161603 its reverse (3061615131), we get a palindrome (4376776734).

The spelling of 1315161603 in words is "one billion, three hundred fifteen million, one hundred sixty-one thousand, six hundred three".