27771231 has 8 divisors (see below), whose sum is σ = 37141504. Its totient is φ = 18457560.

The previous prime is 27771223. The next prime is 27771239. The reversal of 27771231 is 13217772.

It is an interprime number because it is at equal distance from previous prime (27771223) and next prime (27771239).

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

It is not a de Polignac number, because 27771231 - 2³ = 27771223 is a prime.

It is a super-2 number, since 2×27771231² = 1542482542510722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27771239) 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, 12991 + ... + 14976.

It is an arithmetic number, because the mean of its divisors is an integer number (4642688).

Almost surely, 2^27771231 is an apocalyptic number.

27771231 is a deficient number, since it is larger than the sum of its proper divisors (9370273).

27771231 is a wasteful number, since it uses less digits than its factorization.

27771231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28301.

The product of its digits is 4116, while the sum is 30.

The square root of 27771231 is about 5269.8416484748. The cubic root of 27771231 is about 302.8296376998.

The spelling of 27771231 in words is "twenty-seven million, seven hundred seventy-one thousand, two hundred thirty-one".