43021247270861 has 4 divisors (see below), whose sum is σ = 43401966273372. Its totient is φ = 42640528268352.

The previous prime is 43021247270851. The next prime is 43021247270867. The reversal of 43021247270861 is 16807274212034.

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 1692356420836 + 41328890850025 = 1300906^2 + 6428755^2 .

It is a cyclic number.

It is not a de Polignac number, because 43021247270861 - 2²⁶ = 43021180161997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43021247270867) 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, 190359501086 + ... + 190359501311.

It is an arithmetic number, because the mean of its divisors is an integer number (10850491568343).

Almost surely, 2^{43021247270861} is an apocalyptic number.

It is an amenable number.

43021247270861 is a deficient number, since it is larger than the sum of its proper divisors (380719002511).

43021247270861 is a wasteful number, since it uses less digits than its factorization.

43021247270861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380719002510.

The product of its (nonzero) digits is 903168, while the sum is 47.

The spelling of 43021247270861 in words is "forty-three trillion, twenty-one billion, two hundred forty-seven million, two hundred seventy thousand, eight hundred sixty-one".