1331315307 has 12 divisors (see below), whose sum is σ = 2197726960. Its totient is φ = 760751568.

The previous prime is 1331315287. The next prime is 1331315327. The reversal of 1331315307 is 7035131331.

1331315307 is a `hidden beast` number, since 13 + 31 + 315 + 307 = 666.

It is an interprime number because it is at equal distance from previous prime (1331315287) and next prime (1331315327).

It is a de Polignac number, because none of the positive numbers 2^k-1331315307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331315327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10565932 + ... + 10566057.

Almost surely, 2^1331315307 is an apocalyptic number.

1331315307 is a deficient number, since it is larger than the sum of its proper divisors (866411653).

1331315307 is a wasteful number, since it uses less digits than its factorization.

1331315307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21132002 (or 21131999 counting only the distinct ones).

The product of its (nonzero) digits is 2835, while the sum is 27.

The square root of 1331315307 is about 36487.1937397219. The cubic root of 1331315307 is about 1100.0868545744.

Adding to 1331315307 its reverse (7035131331), we get a palindrome (8366446638).

The spelling of 1331315307 in words is "one billion, three hundred thirty-one million, three hundred fifteen thousand, three hundred seven".