221233431340 has 24 divisors (see below), whose sum is σ = 465803251200. Its totient is φ = 88262316288.

The previous prime is 221233431323. The next prime is 221233431347. The reversal of 221233431340 is 43134332122.

It is a happy number.

It is a super-2 number, since 2×221233431340² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221233431299 and 221233431308.

It is not an unprimeable number, because it can be changed into a prime (221233431347) 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, 14433165 + ... + 14448484.

It is an arithmetic number, because the mean of its divisors is an integer number (19408468800).

Almost surely, 2^221233431340 is an apocalyptic number.

221233431340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221233431340 is an abundant number, since it is smaller than the sum of its proper divisors (244569819860).

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

221233431340 is a wasteful number, since it uses less digits than its factorization.

221233431340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28882041 (or 28882039 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 221233431340 its reverse (43134332122), we get a palindrome (264367763462).

The spelling of 221233431340 in words is "two hundred twenty-one billion, two hundred thirty-three million, four hundred thirty-one thousand, three hundred forty".