43305642727381 has 4 divisors (see below), whose sum is σ = 43307913743500. Its totient is φ = 43303371711264.

The previous prime is 43305642727363. The next prime is 43305642727427. The reversal of 43305642727381 is 18372724650334.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29480110934481 + 13825531792900 = 5429559^2 + 3718270^2 .

It is a cyclic number.

It is not a de Polignac number, because 43305642727381 - 2²¹ = 43305640630229 is a prime.

It is a super-2 number, since 2×43305642727381² (a number of 28 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 (43305642727181) 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, 1135479456 + ... + 1135517593.

It is an arithmetic number, because the mean of its divisors is an integer number (10826978435875).

Almost surely, 2^{43305642727381} is an apocalyptic number.

It is an amenable number.

43305642727381 is a deficient number, since it is larger than the sum of its proper divisors (2271016119).

43305642727381 is a wasteful number, since it uses less digits than its factorization.

43305642727381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271016118.

The product of its (nonzero) digits is 20321280, while the sum is 55.

The spelling of 43305642727381 in words is "forty-three trillion, three hundred five billion, six hundred forty-two million, seven hundred twenty-seven thousand, three hundred eighty-one".