27221381 has 8 divisors (see below), whose sum is σ = 30499104. Its totient is φ = 24077520.

The previous prime is 27221353. The next prime is 27221393. The reversal of 27221381 is 18312272.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27221381 is a prime.

It is a super-2 number, since 2×27221381² = 1482007167094322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 27221381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27221681) 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, 33035 + ... + 33848.

It is an arithmetic number, because the mean of its divisors is an integer number (3812388).

Almost surely, 2^27221381 is an apocalyptic number.

It is an amenable number.

27221381 is a deficient number, since it is larger than the sum of its proper divisors (3277723).

27221381 is a wasteful number, since it uses less digits than its factorization.

27221381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66931.

The product of its digits is 1344, while the sum is 26.

The square root of 27221381 is about 5217.4113313021. The cubic root of 27221381 is about 300.8176988334.

The spelling of 27221381 in words is "twenty-seven million, two hundred twenty-one thousand, three hundred eighty-one".