27315520 has 28 divisors (see below), whose sum is σ = 65045844. Its totient is φ = 10926080.

The previous prime is 27315503. The next prime is 27315523. The reversal of 27315520 is 2551372.

It can be written as a sum of positive squares in 2 ways, for example, as 14868736 + 12446784 = 3856^2 + 3528^2 .

It is a super-2 number, since 2×27315520² = 1492275265740800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27315523) 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, 42361 + ... + 43000.

Almost surely, 2^27315520 is an apocalyptic number.

27315520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27315520 is an abundant number, since it is smaller than the sum of its proper divisors (37730324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27315520 is an equidigital number, since it uses as much as digits as its factorization.

27315520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85378 (or 85368 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 27315520 is about 5226.4251644886. The cubic root of 27315520 is about 301.1640698881.

Adding to 27315520 its reverse (2551372), we get a palindrome (29866892).

The spelling of 27315520 in words is "twenty-seven million, three hundred fifteen thousand, five hundred twenty".