42444141521 has 4 divisors (see below), whose sum is σ = 42448703472. Its totient is φ = 42439579572.

The previous prime is 42444141491. The next prime is 42444141533. The reversal of 42444141521 is 12514144424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42444141521 - 2¹⁸ = 42443879377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42444141821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2266991 + ... + 2285636.

It is an arithmetic number, because the mean of its divisors is an integer number (10612175868).

Almost surely, 2^42444141521 is an apocalyptic number.

It is an amenable number.

42444141521 is a deficient number, since it is larger than the sum of its proper divisors (4561951).

42444141521 is an equidigital number, since it uses as much as digits as its factorization.

42444141521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4561950.

The product of its digits is 20480, while the sum is 32.

Adding to 42444141521 its reverse (12514144424), we get a palindrome (54958285945).

The spelling of 42444141521 in words is "forty-two billion, four hundred forty-four million, one hundred forty-one thousand, five hundred twenty-one".