43145323341021 has 24 divisors (see below), whose sum is σ = 68588221193856. Its totient is φ = 25917276551040.

The previous prime is 43145323340971. The next prime is 43145323341059. The reversal of 43145323341021 is 12014332354134.

43145323341021 is a `hidden beast` number, since 4 + 3 + 1 + 4 + 5 + 3 + 233 + 410 + 2 + 1 = 666.

It is not a de Polignac number, because 43145323341021 - 2⁶ = 43145323340957 is a prime.

It is a super-2 number, since 2×43145323341021² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43145323341821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1928357605 + ... + 1928379978.

It is an arithmetic number, because the mean of its divisors is an integer number (2857842549744).

Almost surely, 2^{43145323341021} is an apocalyptic number.

It is an amenable number.

43145323341021 is a deficient number, since it is larger than the sum of its proper divisors (25442897852835).

43145323341021 is a wasteful number, since it uses less digits than its factorization.

43145323341021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856737713 (or 3856737710 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Adding to 43145323341021 its reverse (12014332354134), we get a palindrome (55159655695155).

The spelling of 43145323341021 in words is "forty-three trillion, one hundred forty-five billion, three hundred twenty-three million, three hundred forty-one thousand, twenty-one".