42212237 has 2 divisors, whose sum is σ = 42212238. Its totient is φ = 42212236.

The previous prime is 42212189. The next prime is 42212267. The reversal of 42212237 is 73221224.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31933801 + 10278436 = 5651^2 + 3206^2 .

It is a cyclic number.

It is not a de Polignac number, because 42212237 - 2¹² = 42208141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42212267) 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, 21106118 + 21106119.

It is an arithmetic number, because the mean of its divisors is an integer number (21106119).

Almost surely, 2^42212237 is an apocalyptic number.

It is an amenable number.

42212237 is a deficient number, since it is larger than the sum of its proper divisors (1).

42212237 is an equidigital number, since it uses as much as digits as its factorization.

42212237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 23.

The square root of 42212237 is about 6497.0945044689. The cubic root of 42212237 is about 348.1871901053.

The spelling of 42212237 in words is "forty-two million, two hundred twelve thousand, two hundred thirty-seven".