57481000 has 64 divisors (see below), whose sum is σ = 137479680. Its totient is φ = 22484800.

The previous prime is 57480989. The next prime is 57481001. The reversal of 57481000 is 18475.

57481000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×57481000² = 6608130722000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (57481001) 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, 46389 + ... + 47611.

It is an arithmetic number, because the mean of its divisors is an integer number (2148120).

Almost surely, 2^57481000 is an apocalyptic number.

57481000 is a gapful number since it is divisible by the number (50) 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 57481000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68739840).

57481000 is an abundant number, since it is smaller than the sum of its proper divisors (79998680).

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

57481000 is a wasteful number, since it uses less digits than its factorization.

57481000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291 (or 1277 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 57481000 is about 7581.6225176409. The cubic root of 57481000 is about 385.9296139122.

Adding to 57481000 its reverse (18475), we get a palindrome (57499475).

The spelling of 57481000 in words is "fifty-seven million, four hundred eighty-one thousand".