42243213 has 16 divisors (see below), whose sum is σ = 59494400. Its totient is φ = 26587440.

The previous prime is 42243211. The next prime is 42243239. The reversal of 42243213 is 31234224.

It is not a de Polignac number, because 42243213 - 2¹ = 42243211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42243213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42243211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17748 + ... + 19986.

It is an arithmetic number, because the mean of its divisors is an integer number (3718400).

Almost surely, 2^42243213 is an apocalyptic number.

It is an amenable number.

42243213 is a deficient number, since it is larger than the sum of its proper divisors (17251187).

42243213 is a wasteful number, since it uses less digits than its factorization.

42243213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592.

The product of its digits is 1152, while the sum is 21.

The square root of 42243213 is about 6499.4779021088. The cubic root of 42243213 is about 348.2723376839.

Adding to 42243213 its reverse (31234224), we get a palindrome (73477437).

The spelling of 42243213 in words is "forty-two million, two hundred forty-three thousand, two hundred thirteen".