43139649220 has 12 divisors (see below), whose sum is σ = 90593263404. Its totient is φ = 17255859680.

The previous prime is 43139649101. The next prime is 43139649221. The reversal of 43139649220 is 2294693134.

It can be written as a sum of positive squares in 2 ways, for example, as 31029527104 + 12110122116 = 176152^2 + 110046^2 .

It is a super-2 number, since 2×43139649220² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43139649221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1078491211 + ... + 1078491250.

It is an arithmetic number, because the mean of its divisors is an integer number (7549438617).

Almost surely, 2^43139649220 is an apocalyptic number.

It is an amenable number.

43139649220 is an abundant number, since it is smaller than the sum of its proper divisors (47453614184).

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

43139649220 is a wasteful number, since it uses less digits than its factorization.

43139649220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156982470 (or 2156982468 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 43139649220 in words is "forty-three billion, one hundred thirty-nine million, six hundred forty-nine thousand, two hundred twenty".