43066841381 has 4 divisors (see below), whose sum is σ = 43585719072. Its totient is φ = 42547963692.

The previous prime is 43066841351. The next prime is 43066841399. The reversal of 43066841381 is 18314866034.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18314866034 = 2 ⋅9157433017.

It is a cyclic number.

It is not a de Polignac number, because 43066841381 - 2²² = 43062647077 is a prime.

It is a super-2 number, since 2×43066841381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43066841351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259438721 + ... + 259438886.

It is an arithmetic number, because the mean of its divisors is an integer number (10896429768).

Almost surely, 2^43066841381 is an apocalyptic number.

It is an amenable number.

43066841381 is a deficient number, since it is larger than the sum of its proper divisors (518877691).

43066841381 is an equidigital number, since it uses as much as digits as its factorization.

43066841381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518877690.

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 43066841381 in words is "forty-three billion, sixty-six million, eight hundred forty-one thousand, three hundred eighty-one".