43021013 has 8 divisors (see below), whose sum is σ = 50366400. Its totient is φ = 35975520.

The previous prime is 43020961. The next prime is 43021019. The reversal of 43021013 is 31012034.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43021013 - 2¹⁰ = 43019989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43021019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74663 + ... + 75236.

It is an arithmetic number, because the mean of its divisors is an integer number (6295800).

Almost surely, 2^43021013 is an apocalyptic number.

It is an amenable number.

43021013 is a deficient number, since it is larger than the sum of its proper divisors (7345387).

43021013 is a wasteful number, since it uses less digits than its factorization.

43021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149947.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 43021013 is about 6559.0405548373. The cubic root of 43021013 is about 350.3968641124.

Adding to 43021013 its reverse (31012034), we get a palindrome (74033047).

The spelling of 43021013 in words is "forty-three million, twenty-one thousand, thirteen".