42221235252 has 48 divisors (see below), whose sum is σ = 112987868672. Its totient is φ = 12020577120.

The previous prime is 42221235211. The next prime is 42221235257. The reversal of 42221235252 is 25253212224.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42221235257) 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 15 ways as a sum of consecutive naturals, for example, 864274 + ... + 911817.

Almost surely, 2^42221235252 is an apocalyptic number.

42221235252 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

42221235252 is an abundant number, since it is smaller than the sum of its proper divisors (70766633420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42221235252 is a wasteful number, since it uses less digits than its factorization.

42221235252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776388 (or 1776386 counting only the distinct ones).

The product of its digits is 19200, while the sum is 30.

Adding to 42221235252 its reverse (25253212224), we get a palindrome (67474447476).

The spelling of 42221235252 in words is "forty-two billion, two hundred twenty-one million, two hundred thirty-five thousand, two hundred fifty-two".