43221221340 has 48 divisors (see below), whose sum is σ = 132021187200. Its totient is φ = 10477871680.

The previous prime is 43221221327. The next prime is 43221221353. The reversal of 43221221340 is 4312212234.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (43221221327) and next prime (43221221353).

It is a self number, because there is not a number n which added to its sum of digits gives 43221221340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32742690 + ... + 32744009.

It is an arithmetic number, because the mean of its divisors is an integer number (2750441400).

Almost surely, 2^43221221340 is an apocalyptic number.

It is an amenable number.

43221221340 is an abundant number, since it is smaller than the sum of its proper divisors (88799965860).

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

43221221340 is a wasteful number, since it uses less digits than its factorization.

43221221340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65486722 (or 65486720 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 43221221340 its reverse (4312212234), we get a palindrome (47533433574).

The spelling of 43221221340 in words is "forty-three billion, two hundred twenty-one million, two hundred twenty-one thousand, three hundred forty".