43220019 has 4 divisors (see below), whose sum is σ = 57626696. Its totient is φ = 28813344.

The previous prime is 43220017. The next prime is 43220029. The reversal of 43220019 is 91002234.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 43220019 - 2¹ = 43220017 is a prime.

It is a super-2 number, since 2×43220019² = 3735940084720722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43219977 and 43220004.

It is not an unprimeable number, because it can be changed into a prime (43220011) 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, 7203334 + ... + 7203339.

It is an arithmetic number, because the mean of its divisors is an integer number (14406674).

Almost surely, 2^43220019 is an apocalyptic number.

43220019 is a deficient number, since it is larger than the sum of its proper divisors (14406677).

43220019 is a wasteful number, since it uses less digits than its factorization.

43220019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14406676.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 43220019 is about 6574.1934106018. The cubic root of 43220019 is about 350.9363201333.

The spelling of 43220019 in words is "forty-three million, two hundred twenty thousand, nineteen".