55287551 has 16 divisors (see below), whose sum is σ = 62156160. Its totient is φ = 48743520.

The previous prime is 55287541. The next prime is 55287559. The reversal of 55287551 is 15578255.

It is a cyclic number.

It is not a de Polignac number, because 55287551 - 2²² = 51093247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55287559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84341 + ... + 84993.

It is an arithmetic number, because the mean of its divisors is an integer number (3884760).

Almost surely, 2^55287551 is an apocalyptic number.

55287551 is a deficient number, since it is larger than the sum of its proper divisors (6868609).

55287551 is a wasteful number, since it uses less digits than its factorization.

55287551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886.

The product of its digits is 70000, while the sum is 38.

The square root of 55287551 is about 7435.5598982188. The cubic root of 55287551 is about 380.9568476190.

The spelling of 55287551 in words is "fifty-five million, two hundred eighty-seven thousand, five hundred fifty-one".