43223513 has 4 divisors (see below), whose sum is σ = 43498980. Its totient is φ = 42948048.

The previous prime is 43223497. The next prime is 43223527. The reversal of 43223513 is 31532234.

43223513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 10413529 + 32809984 = 3227^2 + 5728^2 .

It is a cyclic number.

It is not a de Polignac number, because 43223513 - 2⁴ = 43223497 is a prime.

It is a super-2 number, since 2×43223513² = 3736544152122338, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43223533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137498 + ... + 137811.

It is an arithmetic number, because the mean of its divisors is an integer number (10874745).

Almost surely, 2^43223513 is an apocalyptic number.

It is an amenable number.

43223513 is a deficient number, since it is larger than the sum of its proper divisors (275467).

43223513 is a wasteful number, since it uses less digits than its factorization.

43223513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275466.

The product of its digits is 2160, while the sum is 23.

The square root of 43223513 is about 6574.4591412526. The cubic root of 43223513 is about 350.9457766960.

Adding to 43223513 its reverse (31532234), we get a palindrome (74755747).

The spelling of 43223513 in words is "forty-three million, two hundred twenty-three thousand, five hundred thirteen".