1564232143 has 2 divisors, whose sum is σ = 1564232144. Its totient is φ = 1564232142.

The previous prime is 1564232141. The next prime is 1564232167. The reversal of 1564232143 is 3412324651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1564232143 - 2¹ = 1564232141 is a prime.

Together with 1564232141, 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 (1564232141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782116071 + 782116072.

It is an arithmetic number, because the mean of its divisors is an integer number (782116072).

Almost surely, 2^1564232143 is an apocalyptic number.

1564232143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1564232143 is an equidigital number, since it uses as much as digits as its factorization.

1564232143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 31.

The square root of 1564232143 is about 39550.3747517012. The cubic root of 1564232143 is about 1160.8258444833.

Adding to 1564232143 its reverse (3412324651), we get a palindrome (4976556794).

The spelling of 1564232143 in words is "one billion, five hundred sixty-four million, two hundred thirty-two thousand, one hundred forty-three".