84217291215 has 8 divisors (see below), whose sum is σ = 134747665968. Its totient is φ = 44915888640.

The previous prime is 84217291199. The next prime is 84217291217. The reversal of 84217291215 is 51219271248.

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

It is not a de Polignac number, because 84217291215 - 2⁴ = 84217291199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84217291217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2807243026 + ... + 2807243055.

It is an arithmetic number, because the mean of its divisors is an integer number (16843458246).

Almost surely, 2^84217291215 is an apocalyptic number.

84217291215 is a deficient number, since it is larger than the sum of its proper divisors (50530374753).

84217291215 is a wasteful number, since it uses less digits than its factorization.

84217291215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5614486089.

The product of its digits is 80640, while the sum is 42.

The spelling of 84217291215 in words is "eighty-four billion, two hundred seventeen million, two hundred ninety-one thousand, two hundred fifteen".