1331243436 has 24 divisors (see below), whose sum is σ = 3269721280. Its totient is φ = 420392592.

The previous prime is 1331243413. The next prime is 1331243467. The reversal of 1331243436 is 6343421331.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2919166 + ... + 2919621.

Almost surely, 2^1331243436 is an apocalyptic number.

It is an amenable number.

1331243436 is an abundant number, since it is smaller than the sum of its proper divisors (1938477844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1331243436 is a wasteful number, since it uses less digits than its factorization.

1331243436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5838813 (or 5838811 counting only the distinct ones).

The product of its digits is 15552, while the sum is 30.

The square root of 1331243436 is about 36486.2088466314. The cubic root of 1331243436 is about 1100.0670581709.

Adding to 1331243436 its reverse (6343421331), we get a palindrome (7674664767).

The spelling of 1331243436 in words is "one billion, three hundred thirty-one million, two hundred forty-three thousand, four hundred thirty-six".