42553221547 has 2 divisors, whose sum is σ = 42553221548. Its totient is φ = 42553221546.

The previous prime is 42553221533. The next prime is 42553221563. The reversal of 42553221547 is 74512235524.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42553221547 is a prime.

It is not a weakly prime, because it can be changed into another prime (42553221647) 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, 21276610773 + 21276610774.

It is an arithmetic number, because the mean of its divisors is an integer number (21276610774).

Almost surely, 2^42553221547 is an apocalyptic number.

42553221547 is a deficient number, since it is larger than the sum of its proper divisors (1).

42553221547 is an equidigital number, since it uses as much as digits as its factorization.

42553221547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336000, while the sum is 40.

The spelling of 42553221547 in words is "forty-two billion, five hundred fifty-three million, two hundred twenty-one thousand, five hundred forty-seven".