1315440361 has 3 divisors (see below), whose sum is σ = 1315476631. Its totient is φ = 1315404092.

The previous prime is 1315440353. The next prime is 1315440367. The reversal of 1315440361 is 1630445131.

The square root of 1315440361 is 36269.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1291036761 + 24403600 = 35931^2 + 4940^2 .

It is not a de Polignac number, because 1315440361 - 2³ = 1315440353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1315440367) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 18135 + ... + 54403.

Almost surely, 2^1315440361 is an apocalyptic number.

1315440361 is the 36269-th square number.

1315440361 is the 18135-th centered octagonal number.

It is an amenable number.

1315440361 is a deficient number, since it is larger than the sum of its proper divisors (36270).

1315440361 is an frugal number, since it uses more digits than its factorization.

1315440361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72538 (or 36269 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The cubic root of 1315440361 is about 1095.6967857940.

Adding to 1315440361 its reverse (1630445131), we get a palindrome (2945885492).

The spelling of 1315440361 in words is "one billion, three hundred fifteen million, four hundred forty thousand, three hundred sixty-one".