43212032420 has 24 divisors (see below), whose sum is σ = 96083225784. Its totient is φ = 16268059136.

The previous prime is 43212032351. The next prime is 43212032449. The reversal of 43212032420 is 2423021234.

It can be written as a sum of positive squares in 4 ways, for example, as 22649046016 + 20562986404 = 150496^2 + 143398^2 .

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, 63546767 + ... + 63547446.

It is an arithmetic number, because the mean of its divisors is an integer number (4003467741).

Almost surely, 2^43212032420 is an apocalyptic number.

It is an amenable number.

43212032420 is an abundant number, since it is smaller than the sum of its proper divisors (52871193364).

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

43212032420 is a wasteful number, since it uses less digits than its factorization.

43212032420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127094239 (or 127094237 counting only the distinct ones).

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

Adding to 43212032420 its reverse (2423021234), we get a palindrome (45635053654).

The spelling of 43212032420 in words is "forty-three billion, two hundred twelve million, thirty-two thousand, four hundred twenty".