216432613 has 2 divisors, whose sum is σ = 216432614. Its totient is φ = 216432612.

The previous prime is 216432589. The next prime is 216432641. The reversal of 216432613 is 316234612.

It is an a-pointer prime, because the next prime (216432641) can be obtained adding 216432613 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163405089 + 53027524 = 12783^2 + 7282^2 .

It is a cyclic number.

It is not a de Polignac number, because 216432613 - 2¹⁷ = 216301541 is a prime.

It is equal to p_11937007 and since 216432613 and 11937007 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216432683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108216306 + 108216307.

It is an arithmetic number, because the mean of its divisors is an integer number (108216307).

Almost surely, 2^216432613 is an apocalyptic number.

It is an amenable number.

216432613 is a deficient number, since it is larger than the sum of its proper divisors (1).

216432613 is an equidigital number, since it uses as much as digits as its factorization.

216432613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 28.

The square root of 216432613 is about 14711.6488878711. The cubic root of 216432613 is about 600.4003004658.

The spelling of 216432613 in words is "two hundred sixteen million, four hundred thirty-two thousand, six hundred thirteen".