55857150 has 144 divisors (see below), whose sum is σ = 162489600. Its totient is φ = 13711680.

The previous prime is 55857107. The next prime is 55857157. The reversal of 55857150 is 5175855.

55857150 is a `hidden beast` number, since 5 + 585 + 71 + 5 + 0 = 666.

It is a super-2 number, since 2×55857150² = 6240042412245000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55857157) 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 71 ways as a sum of consecutive naturals, for example, 401781 + ... + 401919.

It is an arithmetic number, because the mean of its divisors is an integer number (1128400).

Almost surely, 2^55857150 is an apocalyptic number.

55857150 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55857150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81244800).

55857150 is an abundant number, since it is smaller than the sum of its proper divisors (106632450).

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

55857150 is a wasteful number, since it uses less digits than its factorization.

55857150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 35000, while the sum is 36.

The square root of 55857150 is about 7473.7641118783. The cubic root of 55857150 is about 382.2606473836.

The spelling of 55857150 in words is "fifty-five million, eight hundred fifty-seven thousand, one hundred fifty".