27515713 has 4 divisors (see below), whose sum is σ = 27597700. Its totient is φ = 27433728.

The previous prime is 27515711. The next prime is 27515717. The reversal of 27515713 is 31751572.

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 15737089 + 11778624 = 3967^2 + 3432^2 .

It is a 7-Lehmer number, since φ(27515713) divides (27515713-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 27515713 - 2¹ = 27515711 is a prime.

It is a super-2 number, since 2×27515713² = 1514228923796738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27515711) 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, 40488 + ... + 41161.

It is an arithmetic number, because the mean of its divisors is an integer number (6899425).

Almost surely, 2^27515713 is an apocalyptic number.

It is an amenable number.

27515713 is a deficient number, since it is larger than the sum of its proper divisors (81987).

27515713 is an equidigital number, since it uses as much as digits as its factorization.

27515713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81986.

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

The square root of 27515713 is about 5245.5422026708. The cubic root of 27515713 is about 301.8980146256.

It can be divided in two parts, 2751 and 5713, that added together give a square (8464 = 92²).

The spelling of 27515713 in words is "twenty-seven million, five hundred fifteen thousand, seven hundred thirteen".