51389300 has 144 divisors (see below), whose sum is σ = 130616640. Its totient is φ = 17418240.

The previous prime is 51389297. The next prime is 51389309. The reversal of 51389300 is 398315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51389309) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1195079 + ... + 1195121.

It is an arithmetic number, because the mean of its divisors is an integer number (907060).

Almost surely, 2^51389300 is an apocalyptic number.

51389300 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 51389300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65308320).

51389300 is an abundant number, since it is smaller than the sum of its proper divisors (79227340).

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

51389300 is a wasteful number, since it uses less digits than its factorization.

51389300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 51389300 is about 7168.6330635624. The cubic root of 51389300 is about 371.7841754985.

The spelling of 51389300 in words is "fifty-one million, three hundred eighty-nine thousand, three hundred".