213109449 has 16 divisors (see below), whose sum is σ = 330867072. Its totient is φ = 119478528.

The previous prime is 213109441. The next prime is 213109451. The reversal of 213109449 is 944901312.

It is not a de Polignac number, because 213109449 - 2³ = 213109441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213109441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94624 + ... + 96849.

It is an arithmetic number, because the mean of its divisors is an integer number (20679192).

Almost surely, 2^213109449 is an apocalyptic number.

It is an amenable number.

213109449 is a deficient number, since it is larger than the sum of its proper divisors (117757623).

213109449 is a wasteful number, since it uses less digits than its factorization.

213109449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191536.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 213109449 is about 14598.2686987190. The cubic root of 213109449 is about 597.3115354788.

The spelling of 213109449 in words is "two hundred thirteen million, one hundred nine thousand, four hundred forty-nine".