43213013 has 4 divisors (see below), whose sum is σ = 43354080. Its totient is φ = 43071948.

The previous prime is 43212991. The next prime is 43213033. The reversal of 43213013 is 31031234.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43213013 - 2¹⁰ = 43211989 is a prime.

It is a super-3 number, since 3×43213013³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43212982 and 43213000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43213033) 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, 70073 + ... + 70686.

It is an arithmetic number, because the mean of its divisors is an integer number (10838520).

Almost surely, 2^43213013 is an apocalyptic number.

It is an amenable number.

43213013 is a deficient number, since it is larger than the sum of its proper divisors (141067).

43213013 is a wasteful number, since it uses less digits than its factorization.

43213013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141066.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 43213013 is about 6573.6605479748. The cubic root of 43213013 is about 350.9173567549.

Adding to 43213013 its reverse (31031234), we get a palindrome (74244247).

The spelling of 43213013 in words is "forty-three million, two hundred thirteen thousand, thirteen".