43215 has 16 divisors (see below), whose sum is σ = 71808. Its totient is φ = 22176.

The previous prime is 43207. The next prime is 43223. The reversal of 43215 is 51234.

It is an interprime number because it is at equal distance from previous prime (43207) and next prime (43223).

It is not a de Polignac number, because 43215 - 2³ = 43207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 43194 and 43203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 612 + ... + 678.

It is an arithmetic number, because the mean of its divisors is an integer number (4488).

2⁴³²¹⁵ is an apocalyptic number.

43215 is a deficient number, since it is larger than the sum of its proper divisors (28593).

43215 is a wasteful number, since it uses less digits than its factorization.

With its successor (43216) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (118).

43215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118.

The product of its digits is 120, while the sum is 15.

The square root of 43215 is about 207.8821781683. The cubic root of 43215 is about 35.0922735244.

Adding to 43215 its reverse (51234), we get a palindrome (94449).

The spelling of 43215 in words is "forty-three thousand, two hundred fifteen".