27430551 has 12 divisors (see below), whose sum is σ = 39912912. Its totient is φ = 18152736.

The previous prime is 27430531. The next prime is 27430589. The reversal of 27430551 is 15503472.

It is a happy number.

It is not a de Polignac number, because 27430551 - 2¹⁰ = 27429527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27430531) 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 11 ways as a sum of consecutive naturals, for example, 9891 + ... + 12356.

It is an arithmetic number, because the mean of its divisors is an integer number (3326076).

Almost surely, 2^27430551 is an apocalyptic number.

27430551 is a deficient number, since it is larger than the sum of its proper divisors (12482361).

27430551 is a wasteful number, since it uses less digits than its factorization.

27430551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22390 (or 22387 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 27430551 is about 5237.4183525856. The cubic root of 27430551 is about 301.5862314505.

The spelling of 27430551 in words is "twenty-seven million, four hundred thirty thousand, five hundred fifty-one".