216531370743547 has 8 divisors (see below), whose sum is σ = 220617087212160. Its totient is φ = 212445662382720.

The previous prime is 216531370743469. The next prime is 216531370743599. The reversal of 216531370743547 is 745347073135612.

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 216531370743547 - 2²³ = 216531362354939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216531370743491 and 216531370743500.

It is not an unprimeable number, because it can be changed into a prime (216531370747547) 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, 98316022 + ... + 100494292.

It is an arithmetic number, because the mean of its divisors is an integer number (27577135901520).

Almost surely, 2^{216531370743547} is an apocalyptic number.

216531370743547 is a deficient number, since it is larger than the sum of its proper divisors (4085716468613).

216531370743547 is a wasteful number, since it uses less digits than its factorization.

216531370743547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4053893.

The product of its (nonzero) digits is 44452800, while the sum is 58.

The spelling of 216531370743547 in words is "two hundred sixteen trillion, five hundred thirty-one billion, three hundred seventy million, seven hundred forty-three thousand, five hundred forty-seven".