1220523443 has 2 divisors, whose sum is σ = 1220523444. Its totient is φ = 1220523442.

The previous prime is 1220523407. The next prime is 1220523461. The reversal of 1220523443 is 3443250221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220523443 - 2¹⁸ = 1220261299 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220523643) 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 as a sum of consecutive naturals, namely, 610261721 + 610261722.

It is an arithmetic number, because the mean of its divisors is an integer number (610261722).

Almost surely, 2^1220523443 is an apocalyptic number.

1220523443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220523443 is an equidigital number, since it uses as much as digits as its factorization.

1220523443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 1220523443 is about 34935.9906543381. The cubic root of 1220523443 is about 1068.6825264426.

Adding to 1220523443 its reverse (3443250221), we get a palindrome (4663773664).

The spelling of 1220523443 in words is "one billion, two hundred twenty million, five hundred twenty-three thousand, four hundred forty-three".