51224000 has 112 divisors (see below), whose sum is σ = 133929120. Its totient is φ = 19353600.

The previous prime is 51223973. The next prime is 51224029. The reversal of 51224000 is 42215.

It is a congruent number.

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, 151832 + ... + 152168.

Almost surely, 2^51224000 is an apocalyptic number.

51224000 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 51224000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66964560).

51224000 is an abundant number, since it is smaller than the sum of its proper divisors (82705120).

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

51224000 is a wasteful number, since it uses less digits than its factorization.

51224000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 51224000 is about 7157.0943824991. The cubic root of 51224000 is about 371.3851174862.

Adding to 51224000 its reverse (42215), we get a palindrome (51266215).

The spelling of 51224000 in words is "fifty-one million, two hundred twenty-four thousand".