43206140021 has 16 divisors (see below), whose sum is σ = 49364840448. Its totient is φ = 37431860400.

The previous prime is 43206139939. The next prime is 43206140041. The reversal of 43206140021 is 12004160234.

It is not a de Polignac number, because 43206140021 - 2¹⁸ = 43205877877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43206140041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246521 + ... + 383646.

It is an arithmetic number, because the mean of its divisors is an integer number (3085302528).

Almost surely, 2^43206140021 is an apocalyptic number.

It is an amenable number.

43206140021 is a deficient number, since it is larger than the sum of its proper divisors (6158700427).

43206140021 is a wasteful number, since it uses less digits than its factorization.

43206140021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630472.

The product of its (nonzero) digits is 1152, while the sum is 23.

The spelling of 43206140021 in words is "forty-three billion, two hundred six million, one hundred forty thousand, twenty-one".