216565100601 has 4 divisors (see below), whose sum is σ = 288753467472. Its totient is φ = 144376733732.

The previous prime is 216565100539. The next prime is 216565100669. The reversal of 216565100601 is 106001565612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216565100601 - 2¹⁰ = 216565099577 is a prime.

It is a super-2 number, since 2×216565100601² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216565100681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36094183431 + ... + 36094183436.

It is an arithmetic number, because the mean of its divisors is an integer number (72188366868).

Almost surely, 2^216565100601 is an apocalyptic number.

It is an amenable number.

216565100601 is a deficient number, since it is larger than the sum of its proper divisors (72188366871).

216565100601 is an equidigital number, since it uses as much as digits as its factorization.

216565100601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72188366870.

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 216565100601 in words is "two hundred sixteen billion, five hundred sixty-five million, one hundred thousand, six hundred one".