1331215243 has 8 divisors (see below), whose sum is σ = 1415681280. Its totient is φ = 1247433600.

The previous prime is 1331215241. The next prime is 1331215271. The reversal of 1331215243 is 3425121331.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1331215243 - 2¹ = 1331215241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331215241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167083 + ... + 174868.

It is an arithmetic number, because the mean of its divisors is an integer number (176960160).

Almost surely, 2^1331215243 is an apocalyptic number.

1331215243 is a deficient number, since it is larger than the sum of its proper divisors (84466037).

1331215243 is a wasteful number, since it uses less digits than its factorization.

1331215243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342197.

The product of its digits is 2160, while the sum is 25.

The square root of 1331215243 is about 36485.8224931274. The cubic root of 1331215243 is about 1100.0592923962.

Adding to 1331215243 its reverse (3425121331), we get a palindrome (4756336574).

The spelling of 1331215243 in words is "one billion, three hundred thirty-one million, two hundred fifteen thousand, two hundred forty-three".