27315481 has 4 divisors (see below), whose sum is σ = 28922292. Its totient is φ = 25708672.

The previous prime is 27315479. The next prime is 27315499. The reversal of 27315481 is 18451372.

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 20106256 + 7209225 = 4484^2 + 2685^2 .

It is a cyclic number.

It is not a de Polignac number, because 27315481 - 2¹ = 27315479 is a prime.

It is a super-2 number, since 2×27315481² = 1492271004522722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27315401) 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 3 ways as a sum of consecutive naturals, for example, 803380 + ... + 803413.

It is an arithmetic number, because the mean of its divisors is an integer number (7230573).

Almost surely, 2^27315481 is an apocalyptic number.

It is an amenable number.

27315481 is a deficient number, since it is larger than the sum of its proper divisors (1606811).

27315481 is a wasteful number, since it uses less digits than its factorization.

27315481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606810.

The product of its digits is 6720, while the sum is 31.

The square root of 27315481 is about 5226.4214334476. The cubic root of 27315481 is about 301.1639265580.

The spelling of 27315481 in words is "twenty-seven million, three hundred fifteen thousand, four hundred eighty-one".