43512220420 has 12 divisors (see below), whose sum is σ = 91375662924. Its totient is φ = 17404888160.

The previous prime is 43512220379. The next prime is 43512220441. The reversal of 43512220420 is 2402221534.

It can be written as a sum of positive squares in 2 ways, for example, as 28465763524 + 15046456896 = 168718^2 + 122664^2 .

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, 1087805491 + ... + 1087805530.

It is an arithmetic number, because the mean of its divisors is an integer number (7614638577).

Almost surely, 2^43512220420 is an apocalyptic number.

It is an amenable number.

43512220420 is an abundant number, since it is smaller than the sum of its proper divisors (47863442504).

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

43512220420 is a wasteful number, since it uses less digits than its factorization.

43512220420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175611030 (or 2175611028 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 43512220420 its reverse (2402221534), we get a palindrome (45914441954).

The spelling of 43512220420 in words is "forty-three billion, five hundred twelve million, two hundred twenty thousand, four hundred twenty".