27661222 has 4 divisors (see below), whose sum is σ = 41491836. Its totient is φ = 13830610.

The previous prime is 27661219. The next prime is 27661229. The reversal of 27661222 is 22216672.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×27661222³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27661229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6915304 + ... + 6915307.

It is an arithmetic number, because the mean of its divisors is an integer number (10372959).

Almost surely, 2^27661222 is an apocalyptic number.

27661222 is a deficient number, since it is larger than the sum of its proper divisors (13830614).

27661222 is a wasteful number, since it uses less digits than its factorization.

27661222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13830613.

The product of its digits is 4032, while the sum is 28.

The square root of 27661222 is about 5259.3936912918. The cubic root of 27661222 is about 302.4292464808.

Adding to 27661222 its reverse (22216672), we get a palindrome (49877894).

The spelling of 27661222 in words is "twenty-seven million, six hundred sixty-one thousand, two hundred twenty-two".