55127749 has 4 divisors (see below), whose sum is σ = 55145664. Its totient is φ = 55109836.

The previous prime is 55127747. The next prime is 55127773. The reversal of 55127749 is 94772155.

55127749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94772155 = 5 ⋅18954431.

It is a cyclic number.

It is not a de Polignac number, because 55127749 - 2¹ = 55127747 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 (55127747) 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, 3037 + ... + 10930.

It is an arithmetic number, because the mean of its divisors is an integer number (13786416).

Almost surely, 2^55127749 is an apocalyptic number.

It is an amenable number.

55127749 is a deficient number, since it is larger than the sum of its proper divisors (17915).

55127749 is a wasteful number, since it uses less digits than its factorization.

55127749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17914.

The product of its digits is 88200, while the sum is 40.

The square root of 55127749 is about 7424.8063274405. The cubic root of 55127749 is about 380.5894568134.

The spelling of 55127749 in words is "fifty-five million, one hundred twenty-seven thousand, seven hundred forty-nine".