51100224 has 112 divisors (see below), whose sum is σ = 156106368. Its totient is φ = 14450688.

The previous prime is 51100213. The next prime is 51100229. The reversal of 51100224 is 42200115.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×51100224² = 5222465785700352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51100229) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 259294 + ... + 259490.

Almost surely, 2^51100224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51100224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78053184).

51100224 is an abundant number, since it is smaller than the sum of its proper divisors (105006144).

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

51100224 is a wasteful number, since it uses less digits than its factorization.

51100224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 51100224 is about 7148.4420680313. The cubic root of 51100224 is about 371.0857419348.

Adding to 51100224 its reverse (42200115), we get a palindrome (93300339).

The spelling of 51100224 in words is "fifty-one million, one hundred thousand, two hundred twenty-four".