13216278 has 8 divisors (see below), whose sum is σ = 26432568. Its totient is φ = 4405424.

The previous prime is 13216249. The next prime is 13216303. The reversal of 13216278 is 87261231.

It is a sphenic number, since it is the product of 3 distinct primes.

13216278 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 1101351 + ... + 1101362.

It is an arithmetic number, because the mean of its divisors is an integer number (3304071).

Almost surely, 2^13216278 is an apocalyptic number.

13216278 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13216278 is a wasteful number, since it uses less digits than its factorization.

13216278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202718.

The product of its digits is 4032, while the sum is 30.

The square root of 13216278 is about 3635.4199207244. The cubic root of 13216278 is about 236.4302574353.

The spelling of 13216278 in words is "thirteen million, two hundred sixteen thousand, two hundred seventy-eight".