42215 has 4 divisors (see below), whose sum is σ = 50664. Its totient is φ = 33768.

The previous prime is 42209. The next prime is 42221. The reversal of 42215 is 51224.

42215 = 22² + 23² + ... + 51².

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 (42209) and next prime (42221).

It is a cyclic number.

It is not a de Polignac number, because 42215 - 2⁸ = 41959 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8 and base 14.

It is a zygodrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 42215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4217 + ... + 4226.

It is an arithmetic number, because the mean of its divisors is an integer number (12666).

2⁴²²¹⁵ is an apocalyptic number.

42215 is a deficient number, since it is larger than the sum of its proper divisors (8449).

42215 is an equidigital number, since it uses as much as digits as its factorization.

42215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8448.

The product of its digits is 80, while the sum is 14.

The square root of 42215 is about 205.4628920268. The cubic root of 42215 is about 34.8194786798.

Adding to 42215 its reverse (51224), we get a palindrome (93439).

Subtracting 42215 from its reverse (51224), we obtain a palindrome (9009).

The spelling of 42215 in words is "forty-two thousand, two hundred fifteen".