27145553 has 4 divisors (see below), whose sum is σ = 28021248. Its totient is φ = 26269860.

The previous prime is 27145541. The next prime is 27145577. The reversal of 27145553 is 35554172.

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 a cyclic number.

It is not a de Polignac number, because 27145553 - 2⁸ = 27145297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27145523) 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, 437801 + ... + 437862.

It is an arithmetic number, because the mean of its divisors is an integer number (7005312).

Almost surely, 2^27145553 is an apocalyptic number.

It is an amenable number.

27145553 is a deficient number, since it is larger than the sum of its proper divisors (875695).

27145553 is an equidigital number, since it uses as much as digits as its factorization.

27145553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875694.

The product of its digits is 21000, while the sum is 32.

The square root of 27145553 is about 5210.1394415121. The cubic root of 27145553 is about 300.5381193665.

The spelling of 27145553 in words is "twenty-seven million, one hundred forty-five thousand, five hundred fifty-three".