27922561 has 4 divisors (see below), whose sum is σ = 28199124. Its totient is φ = 27646000.

The previous prime is 27922553. The next prime is 27922577. The reversal of 27922561 is 16522972.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25441936 + 2480625 = 5044^2 + 1575^2 .

It is a cyclic number.

It is not a de Polignac number, because 27922561 - 2³ = 27922553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27922511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138130 + ... + 138331.

It is an arithmetic number, because the mean of its divisors is an integer number (7049781).

Almost surely, 2^27922561 is an apocalyptic number.

It is an amenable number.

27922561 is a deficient number, since it is larger than the sum of its proper divisors (276563).

27922561 is a wasteful number, since it uses less digits than its factorization.

27922561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276562.

The product of its digits is 15120, while the sum is 34.

The square root of 27922561 is about 5284.1802580911. The cubic root of 27922561 is about 303.3786977464.

The spelling of 27922561 in words is "twenty-seven million, nine hundred twenty-two thousand, five hundred sixty-one".