57011550 has 48 divisors (see below), whose sum is σ = 144693120. Its totient is φ = 14847840.

The previous prime is 57011501. The next prime is 57011569. The reversal of 57011550 is 5511075.

It is a self number, because there is not a number n which added to its sum of digits gives 57011550.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2031 + ... + 10869.

It is an arithmetic number, because the mean of its divisors is an integer number (3014440).

Almost surely, 2^57011550 is an apocalyptic number.

57011550 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 57011550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72346560).

57011550 is an abundant number, since it is smaller than the sum of its proper divisors (87681570).

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

57011550 is a wasteful number, since it uses less digits than its factorization.

57011550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8897 (or 8892 counting only the distinct ones).

The product of its (nonzero) digits is 875, while the sum is 24.

The square root of 57011550 is about 7550.5993139618. The cubic root of 57011550 is about 384.8761056342.

The spelling of 57011550 in words is "fifty-seven million, eleven thousand, five hundred fifty".