55187767 has 4 divisors (see below), whose sum is σ = 55214536. Its totient is φ = 55161000.

The previous prime is 55187753. The next prime is 55187789. The reversal of 55187767 is 76778155.

55187767 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 an emirpimes, since its reverse is a distinct semiprime: 76778155 = 5 ⋅15355631.

It is a cyclic number.

It is not a de Polignac number, because 55187767 - 2¹⁵ = 55154999 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 (55187707) 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, 10008 + ... + 14509.

It is an arithmetic number, because the mean of its divisors is an integer number (13803634).

Almost surely, 2^55187767 is an apocalyptic number.

55187767 is a deficient number, since it is larger than the sum of its proper divisors (26769).

55187767 is a wasteful number, since it uses less digits than its factorization.

55187767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26768.

The product of its digits is 411600, while the sum is 46.

The square root of 55187767 is about 7428.8469495609. The cubic root of 55187767 is about 380.7275236003.

The spelling of 55187767 in words is "fifty-five million, one hundred eighty-seven thousand, seven hundred sixty-seven".