221342232340 has 24 divisors (see below), whose sum is σ = 472696973280. Its totient is φ = 87036267168.

The previous prime is 221342232323. The next prime is 221342232367. The reversal of 221342232340 is 43232243122.

It is a junction number, because it is equal to n+sod(n) for n = 221342232299 and 221342232308.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 93787902 + ... + 93790261.

It is an arithmetic number, because the mean of its divisors is an integer number (19695707220).

Almost surely, 2^221342232340 is an apocalyptic number.

221342232340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221342232340 is an abundant number, since it is smaller than the sum of its proper divisors (251354740940).

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

221342232340 is a wasteful number, since it uses less digits than its factorization.

221342232340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187578231 (or 187578229 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 221342232340 its reverse (43232243122), we get a palindrome (264574475462).

The spelling of 221342232340 in words is "two hundred twenty-one billion, three hundred forty-two million, two hundred thirty-two thousand, three hundred forty".