216707215511973 has 8 divisors (see below), whose sum is σ = 288944662887936. Its totient is φ = 144470622572000.

The previous prime is 216707215511971. The next prime is 216707215512013. The reversal of 216707215511973 is 379115512707612.

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 216707215511973 - 2¹ = 216707215511971 is a prime.

It is a super-2 number, since 2×216707215511973² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216707215511971) 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, 213016968 + ... + 214031873.

It is an arithmetic number, because the mean of its divisors is an integer number (36118082860992).

Almost surely, 2^{216707215511973} is an apocalyptic number.

It is an amenable number.

216707215511973 is a deficient number, since it is larger than the sum of its proper divisors (72237447375963).

216707215511973 is a wasteful number, since it uses less digits than its factorization.

216707215511973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427217995.

The product of its (nonzero) digits is 5556600, while the sum is 57.

The spelling of 216707215511973 in words is "two hundred sixteen trillion, seven hundred seven billion, two hundred fifteen million, five hundred eleven thousand, nine hundred seventy-three".