42215243 has 8 divisors (see below), whose sum is σ = 48907488. Its totient is φ = 35688384.

The previous prime is 42215237. The next prime is 42215269. The reversal of 42215243 is 34251224.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42215243 - 2⁶ = 42215179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42215443) 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 7 ways as a sum of consecutive naturals, for example, 40796 + ... + 41817.

It is an arithmetic number, because the mean of its divisors is an integer number (6113436).

Almost surely, 2^42215243 is an apocalyptic number.

42215243 is a deficient number, since it is larger than the sum of its proper divisors (6692245).

42215243 is an equidigital number, since it uses as much as digits as its factorization.

42215243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82693.

The product of its digits is 1920, while the sum is 23.

The square root of 42215243 is about 6497.3258345261. The cubic root of 42215243 is about 348.1954548955.

Adding to 42215243 its reverse (34251224), we get a palindrome (76466467).

The spelling of 42215243 in words is "forty-two million, two hundred fifteen thousand, two hundred forty-three".