42232213 has 2 divisors, whose sum is σ = 42232214. Its totient is φ = 42232212.

The previous prime is 42232189. The next prime is 42232219. The reversal of 42232213 is 31223224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36505764 + 5726449 = 6042^2 + 2393^2 .

It is a cyclic number.

It is not a de Polignac number, because 42232213 - 2⁵ = 42232181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42232219) 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 as a sum of consecutive naturals, namely, 21116106 + 21116107.

It is an arithmetic number, because the mean of its divisors is an integer number (21116107).

Almost surely, 2^42232213 is an apocalyptic number.

It is an amenable number.

42232213 is a deficient number, since it is larger than the sum of its proper divisors (1).

42232213 is an equidigital number, since it uses as much as digits as its factorization.

42232213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 19.

The square root of 42232213 is about 6498.6316251962. The cubic root of 42232213 is about 348.2421053853.

Adding to 42232213 its reverse (31223224), we get a palindrome (73455437).

It can be divided in two parts, 4223221 and 3, that added together give a palindrome (4223224).

The spelling of 42232213 in words is "forty-two million, two hundred thirty-two thousand, two hundred thirteen".