55593216 has 180 divisors, whose sum is σ = 189944832. Its totient is φ = 15842304.

The previous prime is 55593193. The next prime is 55593271. The reversal of 55593216 is 61239555.

55593216 is a `hidden beast` number, since 55 + 593 + 2 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 144961 + ... + 145343.

Almost surely, 2^55593216 is an apocalyptic number.

55593216 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55593216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94972416).

55593216 is an abundant number, since it is smaller than the sum of its proper divisors (134351616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55593216 is an equidigital number, since it uses as much as digits as its factorization.

55593216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 395 counting only the distinct ones).

The product of its digits is 40500, while the sum is 36.

The square root of 55593216 is about 7456.0858364158. The cubic root of 55593216 is about 381.6576156033.

The spelling of 55593216 in words is "fifty-five million, five hundred ninety-three thousand, two hundred sixteen".