215255149 has 2 divisors, whose sum is σ = 215255150. Its totient is φ = 215255148.

The previous prime is 215255147. The next prime is 215255179. The reversal of 215255149 is 941552512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211906249 + 3348900 = 14557^2 + 1830^2 .

It is a cyclic number.

It is not a de Polignac number, because 215255149 - 2¹ = 215255147 is a prime.

Together with 215255147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215255141) 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, 107627574 + 107627575.

It is an arithmetic number, because the mean of its divisors is an integer number (107627575).

Almost surely, 2^215255149 is an apocalyptic number.

It is an amenable number.

215255149 is a deficient number, since it is larger than the sum of its proper divisors (1).

215255149 is an equidigital number, since it uses as much as digits as its factorization.

215255149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 34.

The square root of 215255149 is about 14671.5762275224. The cubic root of 215255149 is about 599.3095288690.

The spelling of 215255149 in words is "two hundred fifteen million, two hundred fifty-five thousand, one hundred forty-nine".