216473149 has 2 divisors, whose sum is σ = 216473150. Its totient is φ = 216473148.

The previous prime is 216473141. The next prime is 216473219. The reversal of 216473149 is 941374612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215561124 + 912025 = 14682^2 + 955^2 .

It is a cyclic number.

It is not a de Polignac number, because 216473149 - 2³ = 216473141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216473141) 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, 108236574 + 108236575.

It is an arithmetic number, because the mean of its divisors is an integer number (108236575).

Almost surely, 2^216473149 is an apocalyptic number.

It is an amenable number.

216473149 is a deficient number, since it is larger than the sum of its proper divisors (1).

216473149 is an equidigital number, since it uses as much as digits as its factorization.

216473149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 216473149 is about 14713.0265071467. The cubic root of 216473149 is about 600.4377814273.

The spelling of 216473149 in words is "two hundred sixteen million, four hundred seventy-three thousand, one hundred forty-nine".