42213123 has 8 divisors (see below), whose sum is σ = 62538000. Its totient is φ = 28142064.

The previous prime is 42213109. The next prime is 42213133. The reversal of 42213123 is 32131224.

It is not a de Polignac number, because 42213123 - 2⁸ = 42212867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42213096 and 42213105.

It is not an unprimeable number, because it can be changed into a prime (42213133) 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, 781698 + ... + 781751.

It is an arithmetic number, because the mean of its divisors is an integer number (7817250).

Almost surely, 2^42213123 is an apocalyptic number.

42213123 is a deficient number, since it is larger than the sum of its proper divisors (20324877).

42213123 is a wasteful number, since it uses less digits than its factorization.

42213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563458 (or 1563452 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 42213123 is about 6497.1626884356. The cubic root of 42213123 is about 348.1896261421.

Adding to 42213123 its reverse (32131224), we get a palindrome (74344347).

The spelling of 42213123 in words is "forty-two million, two hundred thirteen thousand, one hundred twenty-three".