27922261 has 4 divisors (see below), whose sum is σ = 27934092. Its totient is φ = 27910432.

The previous prime is 27922249. The next prime is 27922283. The reversal of 27922261 is 16222972.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 16966161 + 10956100 = 4119^2 + 3310^2 .

It is a cyclic number.

It is not a de Polignac number, because 27922261 - 2⁷ = 27922133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27922231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1030 + ... + 7543.

It is an arithmetic number, because the mean of its divisors is an integer number (6983523).

Almost surely, 2^27922261 is an apocalyptic number.

It is an amenable number.

27922261 is a deficient number, since it is larger than the sum of its proper divisors (11831).

27922261 is an equidigital number, since it uses as much as digits as its factorization.

27922261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11830.

The product of its digits is 6048, while the sum is 31.

The square root of 27922261 is about 5284.1518713981. The cubic root of 27922261 is about 303.3776112422.

The spelling of 27922261 in words is "twenty-seven million, nine hundred twenty-two thousand, two hundred sixty-one".