43212340540 has 24 divisors (see below), whose sum is σ = 92458104480. Its totient is φ = 16958804928.

The previous prime is 43212340529. The next prime is 43212340541. The reversal of 43212340540 is 4504321234.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 43212340499 and 43212340508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43212340541) 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, 20382120 + ... + 20384239.

It is an arithmetic number, because the mean of its divisors is an integer number (3852421020).

Almost surely, 2^43212340540 is an apocalyptic number.

It is an amenable number.

43212340540 is an abundant number, since it is smaller than the sum of its proper divisors (49245763940).

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

43212340540 is a wasteful number, since it uses less digits than its factorization.

43212340540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40766421 (or 40766419 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 43212340540 its reverse (4504321234), we get a palindrome (47716661774).

The spelling of 43212340540 in words is "forty-three billion, two hundred twelve million, three hundred forty thousand, five hundred forty".