57281552 has 40 divisors (see below), whose sum is σ = 116778240. Its totient is φ = 27181440.

The previous prime is 57281531. The next prime is 57281591. The reversal of 57281552 is 25518275.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25199 + ... + 27377.

It is an arithmetic number, because the mean of its divisors is an integer number (2919456).

Almost surely, 2^57281552 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 57281552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58389120).

57281552 is an abundant number, since it is smaller than the sum of its proper divisors (59496688).

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

57281552 is a wasteful number, since it uses less digits than its factorization.

57281552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271 (or 2265 counting only the distinct ones).

The product of its digits is 28000, while the sum is 35.

The square root of 57281552 is about 7568.4577028613. The cubic root of 57281552 is about 385.4827295001.

The spelling of 57281552 in words is "fifty-seven million, two hundred eighty-one thousand, five hundred fifty-two".