1563231011 has 2 divisors, whose sum is σ = 1563231012. Its totient is φ = 1563231010.

The previous prime is 1563231001. The next prime is 1563231013. The reversal of 1563231011 is 1101323651.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1563231011 is a prime.

Together with 1563231013, 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 (1563231013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 781615505 + 781615506.

It is an arithmetic number, because the mean of its divisors is an integer number (781615506).

Almost surely, 2^1563231011 is an apocalyptic number.

1563231011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1563231011 is an equidigital number, since it uses as much as digits as its factorization.

1563231011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1563231011 is about 39537.7163098730. The cubic root of 1563231011 is about 1160.5781429893.

Adding to 1563231011 its reverse (1101323651), we get a palindrome (2664554662).

The spelling of 1563231011 in words is "one billion, five hundred sixty-three million, two hundred thirty-one thousand, eleven".