57042216 has 96 divisors (see below), whose sum is σ = 192628800. Its totient is φ = 14814720.

The previous prime is 57042211. The next prime is 57042229. The reversal of 57042216 is 61224075.

It is a self number, because there is not a number n which added to its sum of digits gives 57042216.

It is not an unprimeable number, because it can be changed into a prime (57042211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 400 + ... + 10688.

It is an arithmetic number, because the mean of its divisors is an integer number (2006550).

Almost surely, 2^57042216 is an apocalyptic number.

57042216 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 57042216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96314400).

57042216 is an abundant number, since it is smaller than the sum of its proper divisors (135586584).

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

57042216 is a wasteful number, since it uses less digits than its factorization.

57042216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10319 (or 10312 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 57042216 is about 7552.6297406930. The cubic root of 57042216 is about 384.9451003970.

The spelling of 57042216 in words is "fifty-seven million, forty-two thousand, two hundred sixteen".