43432131220 has 12 divisors (see below), whose sum is σ = 91207475604. Its totient is φ = 17372852480.

The previous prime is 43432131191. The next prime is 43432131241. The reversal of 43432131220 is 2213123434.

It can be written as a sum of positive squares in 2 ways, for example, as 5636105476 + 37796025744 = 75074^2 + 194412^2 .

It is a super-2 number, since 2×43432131220² (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 3 ways as a sum of consecutive naturals, for example, 1085803261 + ... + 1085803300.

It is an arithmetic number, because the mean of its divisors is an integer number (7600622967).

Almost surely, 2^43432131220 is an apocalyptic number.

It is an amenable number.

43432131220 is an abundant number, since it is smaller than the sum of its proper divisors (47775344384).

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

43432131220 is a wasteful number, since it uses less digits than its factorization.

43432131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171606570 (or 2171606568 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 43432131220 its reverse (2213123434), we get a palindrome (45645254654).

The spelling of 43432131220 in words is "forty-three billion, four hundred thirty-two million, one hundred thirty-one thousand, two hundred twenty".