1331224243 has 8 divisors (see below), whose sum is σ = 1336016160. Its totient is φ = 1326440640.

The previous prime is 1331224201. The next prime is 1331224319. The reversal of 1331224243 is 3424221331.

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 1331224243 - 2²¹ = 1329127091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331204243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557913 + ... + 560293.

It is an arithmetic number, because the mean of its divisors is an integer number (167002020).

Almost surely, 2^1331224243 is an apocalyptic number.

1331224243 is a deficient number, since it is larger than the sum of its proper divisors (4791917).

1331224243 is a wasteful number, since it uses less digits than its factorization.

1331224243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4157.

The product of its digits is 3456, while the sum is 25.

The square root of 1331224243 is about 36485.9458284968. The cubic root of 1331224243 is about 1100.0617714622.

Adding to 1331224243 its reverse (3424221331), we get a palindrome (4755445574).

The spelling of 1331224243 in words is "one billion, three hundred thirty-one million, two hundred twenty-four thousand, two hundred forty-three".