83218615 has 8 divisors (see below), whose sum is σ = 101555280. Its totient is φ = 65446272.

The previous prime is 83218607. The next prime is 83218627. The reversal of 83218615 is 51681238.

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 83218615 - 2³ = 83218607 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140754 + ... + 141343.

It is an arithmetic number, because the mean of its divisors is an integer number (12694410).

Almost surely, 2^83218615 is an apocalyptic number.

83218615 is a deficient number, since it is larger than the sum of its proper divisors (18336665).

83218615 is a wasteful number, since it uses less digits than its factorization.

83218615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282161.

The product of its digits is 11520, while the sum is 34.

The square root of 83218615 is about 9122.4237459131. The cubic root of 83218615 is about 436.5897089352.

The spelling of 83218615 in words is "eighty-three million, two hundred eighteen thousand, six hundred fifteen".