212617449 has 18 divisors (see below), whose sum is σ = 337573418. Its totient is φ = 128858400.

The previous prime is 212617421. The next prime is 212617459. The reversal of 212617449 is 944716212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 149891049 + 62726400 = 12243^2 + 7920^2 .

It is not a de Polignac number, because 212617449 - 2⁵ = 212617417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212617409) 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 in 17 ways as a sum of consecutive naturals, for example, 96532 + ... + 98709.

Almost surely, 2^212617449 is an apocalyptic number.

It is an amenable number.

212617449 is a deficient number, since it is larger than the sum of its proper divisors (124955969).

212617449 is a wasteful number, since it uses less digits than its factorization.

212617449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195269 (or 195255 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 212617449 is about 14581.4076480976. The cubic root of 212617449 is about 596.8515156426.

The spelling of 212617449 in words is "two hundred twelve million, six hundred seventeen thousand, four hundred forty-nine".