27218913 has 16 divisors (see below), whose sum is σ = 38000256. Its totient is φ = 17297280.

The previous prime is 27218909. The next prime is 27218923. The reversal of 27218913 is 31981272.

It is not a de Polignac number, because 27218913 - 2² = 27218909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27218903) 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, 28581 + ... + 29517.

It is an arithmetic number, because the mean of its divisors is an integer number (2375016).

Almost surely, 2^27218913 is an apocalyptic number.

27218913 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

27218913 is a deficient number, since it is larger than the sum of its proper divisors (10781343).

27218913 is a wasteful number, since it uses less digits than its factorization.

27218913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384.

The product of its digits is 6048, while the sum is 33.

The square root of 27218913 is about 5217.1748101822. The cubic root of 27218913 is about 300.8086074441.

The spelling of 27218913 in words is "twenty-seven million, two hundred eighteen thousand, nine hundred thirteen".