27161481 has 4 divisors (see below), whose sum is σ = 36215312. Its totient is φ = 18107652.

The previous prime is 27161479. The next prime is 27161489. The reversal of 27161481 is 18416172.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 27161481 - 2¹ = 27161479 is a prime.

It is a super-2 number, since 2×27161481² = 1475492100226722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27161489) 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, 4526911 + ... + 4526916.

It is an arithmetic number, because the mean of its divisors is an integer number (9053828).

Almost surely, 2^27161481 is an apocalyptic number.

It is an amenable number.

27161481 is a deficient number, since it is larger than the sum of its proper divisors (9053831).

27161481 is an equidigital number, since it uses as much as digits as its factorization.

27161481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9053830.

The product of its digits is 2688, while the sum is 30.

The square root of 27161481 is about 5211.6677752904. The cubic root of 27161481 is about 300.5968894003.

The spelling of 27161481 in words is "twenty-seven million, one hundred sixty-one thousand, four hundred eighty-one".