43030938721 has 9 divisors (see below), whose sum is σ = 43242522579. Its totient is φ = 42820388136.

The previous prime is 43030938719. The next prime is 43030938737. The reversal of 43030938721 is 12783903034.

The square root of 43030938721 is 207439.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 42096780625 + 934158096 = 205175^2 + 30564^2 .

It is not a de Polignac number, because 43030938721 - 2¹ = 43030938719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43030938221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 58704871 + ... + 58705603.

It is an arithmetic number, because the mean of its divisors is an integer number (4804724731).

Almost surely, 2^43030938721 is an apocalyptic number.

43030938721 is the 207439-th square number.

43030938721 is the 103720-th centered octagonal number.

It is an amenable number.

43030938721 is a deficient number, since it is larger than the sum of its proper divisors (211583858).

43030938721 is an frugal number, since it uses more digits than its factorization.

43030938721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032 (or 1016 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 43030938721 in words is "forty-three billion, thirty million, nine hundred thirty-eight thousand, seven hundred twenty-one".