216624101 has 2 divisors, whose sum is σ = 216624102. Its totient is φ = 216624100.

The previous prime is 216624059. The next prime is 216624127. The reversal of 216624101 is 101426612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175536001 + 41088100 = 13249^2 + 6410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216624101 is a prime.

It is a super-2 number, since 2×216624101² = 93852002268116402, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216624151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108312050 + 108312051.

It is an arithmetic number, because the mean of its divisors is an integer number (108312051).

Almost surely, 2^216624101 is an apocalyptic number.

It is an amenable number.

216624101 is a deficient number, since it is larger than the sum of its proper divisors (1).

216624101 is an equidigital number, since it uses as much as digits as its factorization.

216624101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 216624101 is about 14718.1554890550. The cubic root of 216624101 is about 600.5773156292.

The spelling of 216624101 in words is "two hundred sixteen million, six hundred twenty-four thousand, one hundred one".