43342752721 has 4 divisors (see below), whose sum is σ = 43348071844. Its totient is φ = 43337433600.

The previous prime is 43342752701. The next prime is 43342752731. The reversal of 43342752721 is 12725724334.

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 4701022096 + 38641730625 = 68564^2 + 196575^2 .

It is a cyclic number.

It is not a de Polignac number, because 43342752721 - 2⁵ = 43342752689 is a prime.

It is a super-3 number, since 3×43342752721³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43342752701) 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, 2647320 + ... + 2663641.

It is an arithmetic number, because the mean of its divisors is an integer number (10837017961).

Almost surely, 2^43342752721 is an apocalyptic number.

It is an amenable number.

43342752721 is a deficient number, since it is larger than the sum of its proper divisors (5319123).

43342752721 is an equidigital number, since it uses as much as digits as its factorization.

43342752721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5319122.

The product of its digits is 282240, while the sum is 40.

The spelling of 43342752721 in words is "forty-three billion, three hundred forty-two million, seven hundred fifty-two thousand, seven hundred twenty-one".