216872413 has 2 divisors, whose sum is σ = 216872414. Its totient is φ = 216872412.

The previous prime is 216872407. The next prime is 216872419. The reversal of 216872413 is 314278612.

It is a balanced prime because it is at equal distance from previous prime (216872407) and next prime (216872419).

It can be written as a sum of positive squares in only one way, i.e., 187744804 + 29127609 = 13702^2 + 5397^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216872413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216872419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108436206 + 108436207.

It is an arithmetic number, because the mean of its divisors is an integer number (108436207).

Almost surely, 2^216872413 is an apocalyptic number.

It is an amenable number.

216872413 is a deficient number, since it is larger than the sum of its proper divisors (1).

216872413 is an equidigital number, since it uses as much as digits as its factorization.

216872413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 216872413 is about 14726.5886409582. The cubic root of 216872413 is about 600.8067047079.

The spelling of 216872413 in words is "two hundred sixteen million, eight hundred seventy-two thousand, four hundred thirteen".