51380250 has 32 divisors (see below), whose sum is σ = 128246976. Its totient is φ = 13701200.

The previous prime is 51380249. The next prime is 51380269. The reversal of 51380250 is 5208315.

It is a self number, because there is not a number n which added to its sum of digits gives 51380250.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33504 + ... + 35003.

It is an arithmetic number, because the mean of its divisors is an integer number (4007718).

Almost surely, 2^51380250 is an apocalyptic number.

51380250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51380250 is an abundant number, since it is smaller than the sum of its proper divisors (76866726).

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

51380250 is a wasteful number, since it uses less digits than its factorization.

51380250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68527 (or 68517 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 51380250 is about 7168.0018136158. The cubic root of 51380250 is about 371.7623496558.

Adding to 51380250 its reverse (5208315), we get a palindrome (56588565).

The spelling of 51380250 in words is "fifty-one million, three hundred eighty thousand, two hundred fifty".