42212213 has 4 divisors (see below), whose sum is σ = 42231948. Its totient is φ = 42192480.

The previous prime is 42212189. The next prime is 42212237. The reversal of 42212213 is 31221224.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (42212189) and next prime (42212237).

It can be written as a sum of positive squares in 2 ways, for example, as 2798929 + 39413284 = 1673^2 + 6278^2 .

It is a cyclic number.

It is not a de Polignac number, because 42212213 - 2¹⁶ = 42146677 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42212191 and 42212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42212293) 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, 6206 + ... + 11087.

It is an arithmetic number, because the mean of its divisors is an integer number (10557987).

Almost surely, 2^42212213 is an apocalyptic number.

It is an amenable number.

42212213 is a deficient number, since it is larger than the sum of its proper divisors (19735).

42212213 is a wasteful number, since it uses less digits than its factorization.

42212213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19734.

The product of its digits is 192, while the sum is 17.

The square root of 42212213 is about 6497.0926574892. The cubic root of 42212213 is about 348.1871241174.

Adding to 42212213 its reverse (31221224), we get a palindrome (73433437).

It can be divided in two parts, 4221221 and 3, that added together give a palindrome (4221224).

The spelling of 42212213 in words is "forty-two million, two hundred twelve thousand, two hundred thirteen".