222131521543 has 8 divisors (see below), whose sum is σ = 239266492416. Its totient is φ = 205619640600.

The previous prime is 222131521541. The next prime is 222131521553. The reversal of 222131521543 is 345125131222.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 222131521543 - 2¹ = 222131521541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155771743 + ... + 155773168.

It is an arithmetic number, because the mean of its divisors is an integer number (29908311552).

Almost surely, 2^222131521543 is an apocalyptic number.

222131521543 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

222131521543 is a deficient number, since it is larger than the sum of its proper divisors (17134970873).

222131521543 is a wasteful number, since it uses less digits than its factorization.

222131521543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311544965.

The product of its digits is 14400, while the sum is 31.

Adding to 222131521543 its reverse (345125131222), we get a palindrome (567256652765).

The spelling of 222131521543 in words is "two hundred twenty-two billion, one hundred thirty-one million, five hundred twenty-one thousand, five hundred forty-three".