27557131 has 4 divisors (see below), whose sum is σ = 31493872. Its totient is φ = 23620392.

The previous prime is 27557129. The next prime is 27557137. The reversal of 27557131 is 13175572.

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

It is a cyclic number.

It is not a de Polignac number, because 27557131 - 2¹ = 27557129 is a prime.

It is a super-2 number, since 2×27557131² = 1518790937902322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27557093 and 27557102.

It is not an unprimeable number, because it can be changed into a prime (27557137) 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, 1968360 + ... + 1968373.

It is an arithmetic number, because the mean of its divisors is an integer number (7873468).

Almost surely, 2^27557131 is an apocalyptic number.

27557131 is a deficient number, since it is larger than the sum of its proper divisors (3936741).

27557131 is an equidigital number, since it uses as much as digits as its factorization.

27557131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3936740.

The product of its digits is 7350, while the sum is 31.

The square root of 27557131 is about 5249.4886417631. The cubic root of 27557131 is about 302.0494159156.

The spelling of 27557131 in words is "twenty-seven million, five hundred fifty-seven thousand, one hundred thirty-one".