43221471829 has 4 divisors (see below), whose sum is σ = 43357817484. Its totient is φ = 43085126176.

The previous prime is 43221471767. The next prime is 43221471851. The reversal of 43221471829 is 92817412234.

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 25186324804 + 18035147025 = 158702^2 + 134295^2 .

It is a cyclic number.

It is not a de Polignac number, because 43221471829 - 2⁷ = 43221471701 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 (43221471869) 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, 68172352 + ... + 68172985.

It is an arithmetic number, because the mean of its divisors is an integer number (10839454371).

Almost surely, 2^43221471829 is an apocalyptic number.

It is an amenable number.

43221471829 is a deficient number, since it is larger than the sum of its proper divisors (136345655).

43221471829 is a wasteful number, since it uses less digits than its factorization.

43221471829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136345654.

The product of its digits is 193536, while the sum is 43.

The spelling of 43221471829 in words is "forty-three billion, two hundred twenty-one million, four hundred seventy-one thousand, eight hundred twenty-nine".