51022200 has 48 divisors (see below), whose sum is σ = 158170680. Its totient is φ = 13605760.

The previous prime is 51022159. The next prime is 51022217. The reversal of 51022200 is 222015.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 41919 + ... + 43118.

Almost surely, 2^51022200 is an apocalyptic number.

51022200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51022200 is an abundant number, since it is smaller than the sum of its proper divisors (107148480).

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

51022200 is a wasteful number, since it uses less digits than its factorization.

51022200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85056 (or 85047 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 51022200 is about 7142.9825703273. The cubic root of 51022200 is about 370.8967777098.

Adding to 51022200 its reverse (222015), we get a palindrome (51244215).

The spelling of 51022200 in words is "fifty-one million, twenty-two thousand, two hundred".