55650240 has 280 divisors, whose sum is σ = 210220560. Its totient is φ = 13934592.

The previous prime is 55650233. The next prime is 55650247. The reversal of 55650240 is 4205655.

55650240 is a `hidden beast` number, since 5 + 5 + 650 + 2 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (55650233) and next prime (55650247).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55650247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 492424 + ... + 492536.

Almost surely, 2^55650240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55650240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105110280).

55650240 is an abundant number, since it is smaller than the sum of its proper divisors (154570320).

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

55650240 is a wasteful number, since it uses less digits than its factorization.

55650240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 55650240 is about 7459.9088466281. The cubic root of 55650240 is about 381.7880644148.

Adding to 55650240 its reverse (4205655), we get a palindrome (59855895).

The spelling of 55650240 in words is "fifty-five million, six hundred fifty thousand, two hundred forty".