56851000 has 64 divisors (see below), whose sum is σ = 134316000. Its totient is φ = 22521600.

The previous prime is 56850979. The next prime is 56851001. The reversal of 56851000 is 15865.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56851001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138796 + ... + 139204.

Almost surely, 2^56851000 is an apocalyptic number.

56851000 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 56851000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67158000).

56851000 is an abundant number, since it is smaller than the sum of its proper divisors (77465000).

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

56851000 is a wasteful number, since it uses less digits than its factorization.

56851000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 56851000 is about 7539.9602120966. The cubic root of 56851000 is about 384.5144832751.

Adding to 56851000 its reverse (15865), we get a palindrome (56866865).

The spelling of 56851000 in words is "fifty-six million, eight hundred fifty-one thousand".