1563442057 has 2 divisors, whose sum is σ = 1563442058. Its totient is φ = 1563442056.

The previous prime is 1563442051. The next prime is 1563442091. The reversal of 1563442057 is 7502443651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1417974336 + 145467721 = 37656^2 + 12061^2 .

It is an emirp because it is prime and its reverse (7502443651) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1563442057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1563442051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 781721028 + 781721029.

It is an arithmetic number, because the mean of its divisors is an integer number (781721029).

Almost surely, 2^1563442057 is an apocalyptic number.

It is an amenable number.

1563442057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1563442057 is an equidigital number, since it uses as much as digits as its factorization.

1563442057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 1563442057 is about 39540.3851397530. The cubic root of 1563442057 is about 1160.6303690841.

The spelling of 1563442057 in words is "one billion, five hundred sixty-three million, four hundred forty-two thousand, fifty-seven".