43432021240 has 32 divisors (see below), whose sum is σ = 97942679280. Its totient is φ = 17333585152.

The previous prime is 43432021223. The next prime is 43432021291. The reversal of 43432021240 is 4212023434.

It is a happy number.

It is a super-2 number, since 2×43432021240² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1207789 + ... + 1243228.

Almost surely, 2^43432021240 is an apocalyptic number.

43432021240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43432021240 is an abundant number, since it is smaller than the sum of its proper divisors (54510658040).

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

43432021240 is a wasteful number, since it uses less digits than its factorization.

43432021240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451471 (or 2451467 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 43432021240 its reverse (4212023434), we get a palindrome (47644044674).

The spelling of 43432021240 in words is "forty-three billion, four hundred thirty-two million, twenty-one thousand, two hundred forty".