51202500 has 60 divisors (see below), whose sum is σ = 149314704. Its totient is φ = 13652000.

The previous prime is 51202493. The next prime is 51202519. The reversal of 51202500 is 520215.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 51202500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4087 + ... + 10913.

Almost surely, 2^51202500 is an apocalyptic number.

51202500 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 51202500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74657352).

51202500 is an abundant number, since it is smaller than the sum of its proper divisors (98112204).

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

51202500 is a wasteful number, since it uses less digits than its factorization.

51202500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6854 (or 6837 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 51202500 is about 7155.5922186776. The cubic root of 51202500 is about 371.3331503261. Note that the first 3 decimals are identical.

Adding to 51202500 its reverse (520215), we get a palindrome (51722715).

The spelling of 51202500 in words is "fifty-one million, two hundred two thousand, five hundred".