216146837 has 2 divisors, whose sum is σ = 216146838. Its totient is φ = 216146836.

The previous prime is 216146771. The next prime is 216146863. The reversal of 216146837 is 738641612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136562596 + 79584241 = 11686^2 + 8921^2 .

It is a cyclic number.

It is not a de Polignac number, because 216146837 - 2¹⁶ = 216081301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216146837.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216146867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108073418 + 108073419.

It is an arithmetic number, because the mean of its divisors is an integer number (108073419).

Almost surely, 2^216146837 is an apocalyptic number.

It is an amenable number.

216146837 is a deficient number, since it is larger than the sum of its proper divisors (1).

216146837 is an equidigital number, since it uses as much as digits as its factorization.

216146837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 216146837 is about 14701.9331041874. The cubic root of 216146837 is about 600.1359293882.

The spelling of 216146837 in words is "two hundred sixteen million, one hundred forty-six thousand, eight hundred thirty-seven".