55308787 has 8 divisors (see below), whose sum is σ = 56216160. Its totient is φ = 54405120.

The previous prime is 55308779. The next prime is 55308809. The reversal of 55308787 is 78780355.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55308787 - 2³ = 55308779 is a prime.

It is a super-2 number, since 2×55308787² = 6118123838822738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55308287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54093 + ... + 55105.

It is an arithmetic number, because the mean of its divisors is an integer number (7027020).

Almost surely, 2^55308787 is an apocalyptic number.

55308787 is a deficient number, since it is larger than the sum of its proper divisors (907373).

55308787 is a wasteful number, since it uses less digits than its factorization.

55308787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853.

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 55308787 is about 7436.9877638732. The cubic root of 55308787 is about 381.0056166692.

The spelling of 55308787 in words is "fifty-five million, three hundred eight thousand, seven hundred eighty-seven".