216201007 has 4 divisors (see below), whose sum is σ = 235855656. Its totient is φ = 196546360.

The previous prime is 216201001. The next prime is 216201023. The reversal of 216201007 is 700102612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216201007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216201001) 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, 9827308 + ... + 9827329.

It is an arithmetic number, because the mean of its divisors is an integer number (58963914).

Almost surely, 2^216201007 is an apocalyptic number.

216201007 is a deficient number, since it is larger than the sum of its proper divisors (19654649).

216201007 is a wasteful number, since it uses less digits than its factorization.

216201007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19654648.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 216201007 is about 14703.7752635165. The cubic root of 216201007 is about 600.1860598895.

Adding to 216201007 its reverse (700102612), we get a palindrome (916303619).

The spelling of 216201007 in words is "two hundred sixteen million, two hundred one thousand, seven".