1143315521 has 2 divisors, whose sum is σ = 1143315522. Its totient is φ = 1143315520.

The previous prime is 1143315491. The next prime is 1143315529. The reversal of 1143315521 is 1255133411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 669774400 + 473541121 = 25880^2 + 21761^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143315521 - 2¹⁴ = 1143299137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1143315529) 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, 571657760 + 571657761.

It is an arithmetic number, because the mean of its divisors is an integer number (571657761).

Almost surely, 2^1143315521 is an apocalyptic number.

It is an amenable number.

1143315521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143315521 is an equidigital number, since it uses as much as digits as its factorization.

1143315521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 26.

The square root of 1143315521 is about 33812.9490136545. The cubic root of 1143315521 is about 1045.6556772790.

Adding to 1143315521 its reverse (1255133411), we get a palindrome (2398448932).

The spelling of 1143315521 in words is "one billion, one hundred forty-three million, three hundred fifteen thousand, five hundred twenty-one".