27201561 has 8 divisors (see below), whose sum is σ = 36953280. Its totient is φ = 17792112.

The previous prime is 27201541. The next prime is 27201569. The reversal of 27201561 is 16510272.

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

It is not a de Polignac number, because 27201561 - 2¹⁴ = 27185177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27201569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85381 + ... + 85698.

It is an arithmetic number, because the mean of its divisors is an integer number (4619160).

Almost surely, 2^27201561 is an apocalyptic number.

It is an amenable number.

27201561 is a deficient number, since it is larger than the sum of its proper divisors (9751719).

27201561 is a wasteful number, since it uses less digits than its factorization.

27201561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171135.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 27201561 is about 5215.5115760585. The cubic root of 27201561 is about 300.7446722370.

The spelling of 27201561 in words is "twenty-seven million, two hundred one thousand, five hundred sixty-one".