1143215537 has 2 divisors, whose sum is σ = 1143215538. Its totient is φ = 1143215536.

The previous prime is 1143215531. The next prime is 1143215539. The reversal of 1143215537 is 7355123411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 638269696 + 504945841 = 25264^2 + 22471^2 .

It is an emirp because it is prime and its reverse (7355123411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1143215537 - 2¹⁸ = 1142953393 is a prime.

Together with 1143215539, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1143215531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571607768 + 571607769.

It is an arithmetic number, because the mean of its divisors is an integer number (571607769).

Almost surely, 2^1143215537 is an apocalyptic number.

It is an amenable number.

1143215537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143215537 is an equidigital number, since it uses as much as digits as its factorization.

1143215537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 32.

The square root of 1143215537 is about 33811.4704944934. The cubic root of 1143215537 is about 1045.6251952050.

Adding to 1143215537 its reverse (7355123411), we get a palindrome (8498338948).

The spelling of 1143215537 in words is "one billion, one hundred forty-three million, two hundred fifteen thousand, five hundred thirty-seven".