216013449 has 4 divisors (see below), whose sum is σ = 288017936. Its totient is φ = 144008964.

The previous prime is 216013439. The next prime is 216013459. The reversal of 216013449 is 944310612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (216013439) and next prime (216013459).

It is not a de Polignac number, because 216013449 - 2⁴ = 216013433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216013409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36002239 + ... + 36002244.

It is an arithmetic number, because the mean of its divisors is an integer number (72004484).

Almost surely, 2^216013449 is an apocalyptic number.

It is an amenable number.

216013449 is a deficient number, since it is larger than the sum of its proper divisors (72004487).

216013449 is an equidigital number, since it uses as much as digits as its factorization.

216013449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72004486.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 216013449 is about 14697.3959938487. The cubic root of 216013449 is about 600.0124525193.

The spelling of 216013449 in words is "two hundred sixteen million, thirteen thousand, four hundred forty-nine".