42144213 has 4 divisors (see below), whose sum is σ = 56192288. Its totient is φ = 28096140.

The previous prime is 42144161. The next prime is 42144217. The reversal of 42144213 is 31244124.

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 not a de Polignac number, because 42144213 - 2⁹ = 42143701 is a prime.

It is a super-2 number, since 2×42144213² = 3552269378778738, which contains 22 as substring.

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 42144213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42144217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7024033 + ... + 7024038.

It is an arithmetic number, because the mean of its divisors is an integer number (14048072).

Almost surely, 2^42144213 is an apocalyptic number.

It is an amenable number.

42144213 is a deficient number, since it is larger than the sum of its proper divisors (14048075).

42144213 is a wasteful number, since it uses less digits than its factorization.

42144213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14048074.

The product of its digits is 768, while the sum is 21.

The square root of 42144213 is about 6491.8574383608. The cubic root of 42144213 is about 348.0000578015. Note that the first 4 decimals are identical.

Subtracting from 42144213 its sum of digits (21), we obtain a cube (42144192 = 348³).

Adding to 42144213 its reverse (31244124), we get a palindrome (73388337).

The spelling of 42144213 in words is "forty-two million, one hundred forty-four thousand, two hundred thirteen".