51285400 has 48 divisors (see below), whose sum is σ = 124434000. Its totient is φ = 19620480.

The previous prime is 51285361. The next prime is 51285431. The reversal of 51285400 is 458215.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 975 + ... + 10174.

It is an arithmetic number, because the mean of its divisors is an integer number (2592375).

Almost surely, 2^51285400 is an apocalyptic number.

51285400 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 51285400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62217000).

51285400 is an abundant number, since it is smaller than the sum of its proper divisors (73148600).

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

51285400 is a wasteful number, since it uses less digits than its factorization.

51285400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11188 (or 11179 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 51285400 is about 7161.3825480839. The cubic root of 51285400 is about 371.5334460123.

The spelling of 51285400 in words is "fifty-one million, two hundred eighty-five thousand, four hundred".