27213012 has 72 divisors (see below), whose sum is σ = 71547840. Its totient is φ = 8714880.

The previous prime is 27212981. The next prime is 27213029. The reversal of 27213012 is 21031272.

It is a super-2 number, since 2×27213012² = 1481096044224288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151939 + ... + 152117.

It is an arithmetic number, because the mean of its divisors is an integer number (993720).

Almost surely, 2^27213012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27213012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35773920).

27213012 is an abundant number, since it is smaller than the sum of its proper divisors (44334828).

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

27213012 is a wasteful number, since it uses less digits than its factorization.

27213012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 27213012 is about 5216.6092435604. The cubic root of 27213012 is about 300.7868676599.

Adding to 27213012 its reverse (21031272), we get a palindrome (48244284).

The spelling of 27213012 in words is "twenty-seven million, two hundred thirteen thousand, twelve".