42215315 has 4 divisors (see below), whose sum is σ = 50658384. Its totient is φ = 33772248.

The previous prime is 42215311. The next prime is 42215323. The reversal of 42215315 is 51351224.

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

It is a cyclic number.

It is not a de Polignac number, because 42215315 - 2² = 42215311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42215311) 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 3 ways as a sum of consecutive naturals, for example, 4221527 + ... + 4221536.

It is an arithmetic number, because the mean of its divisors is an integer number (12664596).

Almost surely, 2^42215315 is an apocalyptic number.

42215315 is a deficient number, since it is larger than the sum of its proper divisors (8443069).

42215315 is an equidigital number, since it uses as much as digits as its factorization.

42215315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8443068.

The product of its digits is 1200, while the sum is 23.

The square root of 42215315 is about 6497.3313752648. The cubic root of 42215315 is about 348.1956528498.

Adding to 42215315 its reverse (51351224), we get a palindrome (93566539).

The spelling of 42215315 in words is "forty-two million, two hundred fifteen thousand, three hundred fifteen".