27148481 has 4 divisors (see below), whose sum is σ = 27520452. Its totient is φ = 26776512.

The previous prime is 27148463. The next prime is 27148489. The reversal of 27148481 is 18484172.

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 7612081 + 19536400 = 2759^2 + 4420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27148481 is a prime.

It is a super-2 number, since 2×27148481² = 1474080041214722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27148489) 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, 185876 + ... + 186021.

It is an arithmetic number, because the mean of its divisors is an integer number (6880113).

Almost surely, 2^27148481 is an apocalyptic number.

It is an amenable number.

27148481 is a deficient number, since it is larger than the sum of its proper divisors (371971).

27148481 is an equidigital number, since it uses as much as digits as its factorization.

27148481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371970.

The product of its digits is 14336, while the sum is 35.

The square root of 27148481 is about 5210.4204244955. The cubic root of 27148481 is about 300.5489246229.

The spelling of 27148481 in words is "twenty-seven million, one hundred forty-eight thousand, four hundred eighty-one".