221232400340 has 72 divisors (see below), whose sum is σ = 549898282752. Its totient is φ = 73235514240.

The previous prime is 221232400327. The next prime is 221232400351. The reversal of 221232400340 is 43004232122.

221232400340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 821756 + ... + 1057235.

Almost surely, 2^221232400340 is an apocalyptic number.

221232400340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221232400340 is an abundant number, since it is smaller than the sum of its proper divisors (328665882412).

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

221232400340 is a wasteful number, since it uses less digits than its factorization.

221232400340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879065 (or 1879034 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 221232400340 its reverse (43004232122), we get a palindrome (264236632462).

The spelling of 221232400340 in words is "two hundred twenty-one billion, two hundred thirty-two million, four hundred thousand, three hundred forty".