55128527 has 4 divisors (see below), whose sum is σ = 55674456. Its totient is φ = 54582600.

The previous prime is 55128523. The next prime is 55128551. The reversal of 55128527 is 72582155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72582155 = 5 ⋅14516431.

It is a cyclic number.

It is not a de Polignac number, because 55128527 - 2² = 55128523 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55128523) 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, 272813 + ... + 273014.

It is an arithmetic number, because the mean of its divisors is an integer number (13918614).

Almost surely, 2^55128527 is an apocalyptic number.

55128527 is a deficient number, since it is larger than the sum of its proper divisors (545929).

55128527 is a wasteful number, since it uses less digits than its factorization.

55128527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545928.

The product of its digits is 28000, while the sum is 35.

The square root of 55128527 is about 7424.8587191946. The cubic root of 55128527 is about 380.5912471834.

It can be divided in two parts, 55128 and 527, that added together give a palindrome (55655).

The spelling of 55128527 in words is "fifty-five million, one hundred twenty-eight thousand, five hundred twenty-seven".