222131521542 has 192 divisors, whose sum is σ = 538744227840. Its totient is φ = 60840751104.

The previous prime is 222131521541. The next prime is 222131521553. The reversal of 222131521542 is 245125131222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222131521541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 138054834 + ... + 138056442.

It is an arithmetic number, because the mean of its divisors is an integer number (2805959520).

Almost surely, 2^222131521542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222131521542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269372113920).

222131521542 is an abundant number, since it is smaller than the sum of its proper divisors (316612706298).

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

222131521542 is a wasteful number, since it uses less digits than its factorization.

222131521542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875 (or 1868 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

Adding to 222131521542 its reverse (245125131222), we get a palindrome (467256652764).

The spelling of 222131521542 in words is "two hundred twenty-two billion, one hundred thirty-one million, five hundred twenty-one thousand, five hundred forty-two".