51226200 has 144 divisors (see below), whose sum is σ = 174096000. Its totient is φ = 13497600.

The previous prime is 51226199. The next prime is 51226211. The reversal of 51226200 is 262215.

51226200 = T₄₃₁ + T₄₃₂ + ... + T₇₂₈.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 268105 + ... + 268295.

It is an arithmetic number, because the mean of its divisors is an integer number (1209000).

Almost surely, 2^51226200 is an apocalyptic number.

51226200 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 51226200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87048000).

51226200 is an abundant number, since it is smaller than the sum of its proper divisors (122869800).

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

51226200 is a wasteful number, since it uses less digits than its factorization.

51226200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 51226200 is about 7157.2480745046. The cubic root of 51226200 is about 371.3904342359.

Adding to 51226200 its reverse (262215), we get a palindrome (51488415).

The spelling of 51226200 in words is "fifty-one million, two hundred twenty-six thousand, two hundred".