57231280 has 80 divisors (see below), whose sum is σ = 138276864. Its totient is φ = 22014720.

The previous prime is 57231277. The next prime is 57231281. The reversal of 57231280 is 8213275.

57231280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (57231281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436815 + ... + 436945.

Almost surely, 2^57231280 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 57231280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69138432).

57231280 is an abundant number, since it is smaller than the sum of its proper divisors (81045584).

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

57231280 is a wasteful number, since it uses less digits than its factorization.

57231280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 57231280 is about 7565.1358216492. The cubic root of 57231280 is about 385.3699261101.

The spelling of 57231280 in words is "fifty-seven million, two hundred thirty-one thousand, two hundred eighty".