1331002243 has 2 divisors, whose sum is σ = 1331002244. Its totient is φ = 1331002242.

The previous prime is 1331002223. The next prime is 1331002247. The reversal of 1331002243 is 3422001331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1331002243 - 2¹³ = 1330994051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1331002243.

It is not a weakly prime, because it can be changed into another prime (1331002247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665501121 + 665501122.

It is an arithmetic number, because the mean of its divisors is an integer number (665501122).

Almost surely, 2^1331002243 is an apocalyptic number.

1331002243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331002243 is an equidigital number, since it uses as much as digits as its factorization.

1331002243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1331002243 is about 36482.9034343485. The cubic root of 1331002243 is about 1100.0006179060. Note that the first 3 decimals are identical.

Adding to 1331002243 its reverse (3422001331), we get a palindrome (4753003574).

The spelling of 1331002243 in words is "one billion, three hundred thirty-one million, two thousand, two hundred forty-three".