27213220 has 24 divisors (see below), whose sum is σ = 57532608. Its totient is φ = 10812000.

The previous prime is 27213181. The next prime is 27213227. The reversal of 27213220 is 2231272.

It is not an unprimeable number, because it can be changed into a prime (27213227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1486 + ... + 7525.

It is an arithmetic number, because the mean of its divisors is an integer number (2397192).

Almost surely, 2^27213220 is an apocalyptic number.

27213220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27213220 is an abundant number, since it is smaller than the sum of its proper divisors (30319388).

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

27213220 is a wasteful number, since it uses less digits than its factorization.

27213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9171 (or 9169 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 27213220 is about 5216.6291798440. The cubic root of 27213220 is about 300.7876340029.

Adding to 27213220 its reverse (2231272), we get a palindrome (29444492).

The spelling of 27213220 in words is "twenty-seven million, two hundred thirteen thousand, two hundred twenty".