51122200 has 48 divisors (see below), whose sum is σ = 119333880. Its totient is φ = 20367360.

The previous prime is 51122191. The next prime is 51122231. The reversal of 51122200 is 222115.

It is a super-2 number, since 2×51122200² = 5226958665680000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88312 + ... + 88888.

Almost surely, 2^51122200 is an apocalyptic number.

51122200 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 51122200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59666940).

51122200 is an abundant number, since it is smaller than the sum of its proper divisors (68211680).

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

51122200 is a wasteful number, since it uses less digits than its factorization.

51122200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036 (or 1027 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 51122200 is about 7149.9790209482. The cubic root of 51122200 is about 371.1389302960.

Adding to 51122200 its reverse (222115), we get a palindrome (51344315).

The spelling of 51122200 in words is "fifty-one million, one hundred twenty-two thousand, two hundred".