42553221345 has 48 divisors (see below), whose sum is σ = 76254433920. Its totient is φ = 22515198048.

The previous prime is 42553221343. The next prime is 42553221353. The reversal of 42553221345 is 54312235524.

42553221345 is a `hidden beast` number, since 42 + 5 + 53 + 221 + 345 = 666.

It is not a de Polignac number, because 42553221345 - 2¹ = 42553221343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42553221343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2167644 + ... + 2187186.

It is an arithmetic number, because the mean of its divisors is an integer number (1588634040).

Almost surely, 2^42553221345 is an apocalyptic number.

42553221345 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42553221345 is a deficient number, since it is larger than the sum of its proper divisors (33701212575).

42553221345 is a wasteful number, since it uses less digits than its factorization.

42553221345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19811 (or 19678 counting only the distinct ones).

The product of its digits is 144000, while the sum is 36.

Adding to 42553221345 its reverse (54312235524), we get a palindrome (96865456869).

The spelling of 42553221345 in words is "forty-two billion, five hundred fifty-three million, two hundred twenty-one thousand, three hundred forty-five".