42221521431523 has 8 divisors (see below), whose sum is σ = 48254506628192. Its totient is φ = 36188871054336.

The previous prime is 42221521431511. The next prime is 42221521431533. The reversal of 42221521431523 is 32513412512224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42221521431523 - 2⁵ = 42221521431491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42221521431533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83434590 + ... + 83939107.

It is an arithmetic number, because the mean of its divisors is an integer number (6031813328524).

Almost surely, 2^{42221521431523} is an apocalyptic number.

42221521431523 is a deficient number, since it is larger than the sum of its proper divisors (6032985196669).

42221521431523 is a wasteful number, since it uses less digits than its factorization.

42221521431523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167409741.

The product of its digits is 115200, while the sum is 37.

Adding to 42221521431523 its reverse (32513412512224), we get a palindrome (74734933943747).

The spelling of 42221521431523 in words is "forty-two trillion, two hundred twenty-one billion, five hundred twenty-one million, four hundred thirty-one thousand, five hundred twenty-three".