1563231013 has 2 divisors, whose sum is σ = 1563231014. Its totient is φ = 1563231012.

The previous prime is 1563231011. The next prime is 1563231029. The reversal of 1563231013 is 3101323651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1563174369 + 56644 = 39537^2 + 238^2 .

It is a cyclic number.

It is not a de Polignac number, because 1563231013 - 2¹ = 1563231011 is a prime.

Together with 1563231011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1563231011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 781615506 + 781615507.

It is an arithmetic number, because the mean of its divisors is an integer number (781615507).

Almost surely, 2^1563231013 is an apocalyptic number.

It is an amenable number.

1563231013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1563231013 is an equidigital number, since it uses as much as digits as its factorization.

1563231013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 1563231013 is about 39537.7163351653. The cubic root of 1563231013 is about 1160.5781434842.

Adding to 1563231013 its reverse (3101323651), we get a palindrome (4664554664).

The spelling of 1563231013 in words is "one billion, five hundred sixty-three million, two hundred thirty-one thousand, thirteen".